4.3 Övningar
Sommarmatte 1
(Skillnad mellan versioner)
Versionen från 30 april 2007 kl. 13.51 (redigera) Annagf (Diskussion | bidrag) (→Övning 4.3:3) ← Gå till föregående ändring |
Nuvarande version (31 maj 2007 kl. 07.05) (redigera) (ogör) KTH.SE:u1rp004j (Diskussion | bidrag) |
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(29 mellanliggande versioner visas inte.) | |||
Rad 1: | Rad 1: | ||
+ | |||
==Övning 4.3:1== | ==Övning 4.3:1== | ||
<div class="ovning"> | <div class="ovning"> | ||
- | Bestäm de vinklar v mellan \displaystyle \frac{\pi}{2} och 2\pi som uppfyller | + | Bestäm de vinklar $\,v\, mellan \,\displaystyle \frac{\pi}{2}\, och \,2\pi\,$ som uppfyller |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">\cos{v}=\cos{\displaystyle \frac{\pi}{5}}</td> | + | <td class="ntext" width="33%">\cos{v}=\cos{\displaystyle \frac{\pi}{5}}</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">\sin{v}=\sin{\displaystyle \frac{\pi}{7}}</td> | + | <td class="ntext" width="33%">\sin{v}=\sin{\displaystyle \frac{\pi}{7}}</td> |
- | <td class="ntext">$\textrm{c) }$</td> | + | <td class="ntext">c)</td> |
- | <td class="ntext">\tan{v}=\tan{\displaystyle \frac{2\pi}{7}}</td> | + | <td class="ntext" width="33%">\tan{v}=\tan{\displaystyle \frac{2\pi}{7}}</td> |
</tr> | </tr> | ||
</table> | </table> | ||
Rad 17: | Rad 18: | ||
<div class=NavHead>Facit </div> | <div class=NavHead>Facit </div> | ||
<div class=NavContent> | <div class=NavContent> | ||
- | Facit till alla delfrågorna<br \> | + | Facit till alla delfrågor |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">v = \displaystyle \frac{9\pi}{5}</td> | + | <td class="ntext" width="33%">v = \displaystyle \frac{9\pi}{5}</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">v = \displaystyle \frac{6\pi}{7}</td> | + | <td class="ntext" width="33%">v = \displaystyle \frac{6\pi}{7}</td> |
- | <td class="ntext">$\textrm{c) }$</td> | + | <td class="ntext">c)</td> |
- | <td class="ntext">v = \displaystyle \frac{9\pi}{7}</td> | + | <td class="ntext" width="33%">v = \displaystyle \frac{9\pi}{7}</td> |
</tr> | </tr> | ||
</table> | </table> | ||
Rad 32: | Rad 33: | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning a </div> | + | <div class=NavHead>Lösning a) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga a<br />[[Bild:4_3_1a.gif]] | + | Lösning till delfråga a) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_1a.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning b </DIV> | + | <div class=NavHead>Lösning b) </DIV> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga b<br />[[Bild:4_3_1b.gif]] | + | Lösning till delfråga b) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_1b.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning c </div> | + | <div class=NavHead>Lösning c) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga c<br />[[Bild:4_3_1c.gif]] | + | Lösning till delfråga c) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_1c.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
Rad 54: | Rad 76: | ||
==Övning 4.3:2== | ==Övning 4.3:2== | ||
<div class="ovning"> | <div class="ovning"> | ||
- | Bestäm de vinklar v mellan 0 och \pi som uppfyller | + | Bestäm de vinklar $\,v\, mellan 0 och \,\pi\,$ som uppfyller |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">\cos{v} = \cos{\displaystyle \frac{3\pi}{2}}</td> | + | <td class="ntext" width="50%">\cos{v} = \cos{\displaystyle \frac{3\pi}{2}}</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">\cos{v} = \cos{ \displaystyle \frac{7\pi}{5}}</td> | + | <td class="ntext" width="50%">\cos{v} = \cos{ \displaystyle \frac{7\pi}{5}}</td> |
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
Rad 69: | Rad 91: | ||
<div class=NavHead>Facit </div> | <div class=NavHead>Facit </div> | ||
<div class=NavContent> | <div class=NavContent> | ||
- | Facit till alla delfrågorna<br \> | + | Facit till alla delfrågor |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">v=\displaystyle \frac{\pi}{2}</td> | + | <td class="ntext" width="50%">v=\displaystyle \frac{\pi}{2}</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">v=\displaystyle \frac{3\pi}{5}</td> | + | <td class="ntext" width="50%">v=\displaystyle \frac{3\pi}{5}</td> |
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
Rad 83: | Rad 105: | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning a </div> | + | <div class=NavHead>Lösning a) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga a<br />[[Bild:4_3_2a.gif]] | + | Lösning till delfråga a) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_2a.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning b </DIV> | + | <div class=NavHead>Lösning b) </DIV> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga b<br />[[Bild:4_3_2b.gif]] | + | Lösning till delfråga b) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_2b.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
Rad 98: | Rad 134: | ||
==Övning 4.3:3== | ==Övning 4.3:3== | ||
<div class="ovning"> | <div class="ovning"> | ||
- | Antag att -\displaystyle \frac{\pi}{2} \leq v \leq \displaystyle \frac{\pi}{2} och att \sin{v} = a. Uttryck med hjälp av a | + | Antag att $\,-\displaystyle \frac{\pi}{2} \leq v \leq \displaystyle \frac{\pi}{2}\, och att \,\sin{v} = a\,. Uttryck med hjälp av \,a$ |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">\sin{(-v)}</td> | + | <td class="ntext" width="50%">\sin{(-v)}</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">$\sin{(\pi-v)}$</td> | + | <td class="ntext" width="50%">\sin{(\pi-v)}</td> |
- | <td class="ntext">\textrm{c) }</td> | + | |
- | <td class="ntext">$\cos{v}$</td> | + | |
</tr> | </tr> | ||
- | <tr><td height="5px"/></tr> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{d) }$</td> | + | <td class="ntext">c)</td> |
- | <td class="ntext">\sin{\left(\displaystyle \frac{\pi}{2}-v\right)}</td> | + | <td class="ntext" width="50%">$\cos{v}$</td> |
- | <td class="ntext">$\textrm{e) }$</td> | + | <td class="ntext">d)</td> |
- | <td class="ntext">\cos{\left( \displaystyle \frac{\pi}{2} + v\right)}</td> | + | <td class="ntext" width="50%">\sin{\left(\displaystyle \frac{\pi}{2}-v\right)}</td> |
- | <td class="ntext">$\textrm{f) }$</td> | + | </tr> |
- | <td class="ntext">\sin{\left( \displaystyle \frac{\pi}{3} + v \right)}</td> | + | <tr align="left"> |
+ | <td class="ntext">e)</td> | ||
+ | <td class="ntext" width="50%">\cos{\left( \displaystyle \frac{\pi}{2} + v\right)}</td> | ||
+ | <td class="ntext">f)</td> | ||
+ | <td class="ntext" width="50%">\sin{\left( \displaystyle \frac{\pi}{3} + v \right)}</td> | ||
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
Rad 124: | Rad 161: | ||
<div class=NavHead>Facit </div> | <div class=NavHead>Facit </div> | ||
<div class=NavContent> | <div class=NavContent> | ||
- | Facit till alla delfrågorna<br \> | + | Facit till alla delfrågor |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">-a</td> | + | <td class="ntext" width="50%">-a</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">a</td> | + | <td class="ntext" width="50%">a</td> |
- | <td class="ntext">$\textrm{c) }$</td> | + | </tr> |
- | <td class="ntext">\sqrt{1-a^2}</td> | + | <tr align="left"> |
+ | <td class="ntext">c)</td> | ||
+ | <td class="ntext" width="50%">$\sqrt{1-a^2}$</td> | ||
+ | <td class="ntext">d)</td> | ||
+ | <td class="ntext" width="50%">\sqrt{1-a^2}</td> | ||
</tr> | </tr> | ||
- | <tr><td height="5px"/></tr> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{d) }$</td> | + | <td class="ntext">e)</td> |
- | <td class="ntext">\sqrt{1-a^2}</td> | + | <td class="ntext" width="50%">-a</td> |
- | <td class="ntext">\textrm{e) }</td> | + | <td class="ntext">f)</td> |
- | <td class="ntext">-a</td> | + | <td class="ntext" width="50%">\displaystyle \frac{\sqrt{3}}{2}\sqrt{1-a^2}+\displaystyle \frac{1}{2}\cdot a </td> |
- | <td class="ntext">$\textrm{f) }$</td> | + | |
- | <td class="ntext">\displaystyle \frac{\sqrt{3}}{2}\sqrt{1-a^2}+\displaystyle \frac{1}{2}\cdot a </td> | + | |
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
Rad 149: | Rad 187: | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning a </div> | + | <div class=NavHead>Lösning a) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga a<br />[[Bild:4_3_3a.gif]] | + | Lösning till delfråga a) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_3a.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning b </DIV> | + | <div class=NavHead>Lösning b) </DIV> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga b<br />[[Bild:4_3_3b.gif]] | + | Lösning till delfråga b) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_3b.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
Rad 164: | Rad 216: | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning c </div> | + | <div class=NavHead>Lösning c) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga c<br />[[Bild:4_3_3c.gif]] | + | Lösning till delfråga c) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_3c.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning d </DIV> | + | <div class=NavHead>Lösning d) </DIV> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga d<br />[[Bild:4_3_3d.gif]] | + | Lösning till delfråga d) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_3d.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
Rad 179: | Rad 245: | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning e </div> | + | <div class=NavHead>Lösning e) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga e<br />[[Bild:4_3_3e.gif]] | + | Lösning till delfråga e) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_3e.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning f </DIV> | + | <div class=NavHead>Lösning f) </DIV> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga f<br />[[Bild:4_3_3f.gif]] | + | Lösning till delfråga f) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_3f.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
Rad 194: | Rad 274: | ||
==Övning 4.3:4== | ==Övning 4.3:4== | ||
<div class="ovning"> | <div class="ovning"> | ||
- | Antag att 0 \leq v \leq \pi och att \cos{v}=b. Uttryck med hjälp av b | + | Antag att $\,0 \leq v \leq \pi\, och att \,\cos{v}=b\,. Uttryck med hjälp av \,b\,$ |
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{a) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">\sin^2{v}</td> | + | <td class="ntext" width="50%">\sin^2{v}</td> |
- | <td class="ntext">$\textrm{b) }$</td> | + | <td class="ntext">b)</td> |
- | <td class="ntext">$\sin{v}$</td> | + | <td class="ntext" width="50%">$\sin{v}$</td> |
- | <td class="ntext">$\textrm{c) }$</td> | + | </tr> |
- | <td class="ntext">$\sin{2v}$</td> | + | <tr align="left"> |
+ | <td class="ntext">c)</td> | ||
+ | <td class="ntext" width="50%">$\sin{2v}$</td> | ||
+ | <td class="ntext">d)</td> | ||
+ | <td class="ntext" width="50%">$\cos{2v}$</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">e)</td> | ||
+ | <td class="ntext" width="50%">$\sin{\left( v+\displaystyle \frac{\pi}{4} \right)}$</td> | ||
+ | <td class="ntext">f)</td> | ||
+ | <td class="ntext" width="50%">$\cos{\left( v-\displaystyle \frac{\pi}{3} \right)}$</td> | ||
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Facit </div> | ||
+ | <div class=NavContent> | ||
+ | Facit till alla delfrågor | ||
+ | <table width="100%" cellspacing="10px"> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">a)</td> | ||
+ | <td class="ntext" width="50%">1-b^2</td> | ||
+ | <td class="ntext">b)</td> | ||
+ | <td class="ntext" width="50%">\sqrt{1-b^2}</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">c)</td> | ||
+ | <td class="ntext" width="50%">2b\sqrt{1-b^2}</td> | ||
+ | <td class="ntext">d)</td> | ||
+ | <td class="ntext" width="50%">2b^2-1</td> | ||
+ | </tr> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{d) }$</td> | + | <td class="ntext">e)</td> |
- | <td class="ntext">\cos{2v}</td> | + | <td class="ntext" width="50%">$\sqrt{1-b^2}\cdot\displaystyle \frac{1}{\sqrt{2}} + b\cdot \displaystyle \frac{1}{\sqrt{2}} $</td> |
- | <td class="ntext">$\textrm{e) }$</td> | + | <td class="ntext">f)</td> |
- | <td class="ntext">$\sin{\left( v+\displaystyle \frac{\pi}{4} \right)}$</td> | + | <td class="ntext" width="50%">$b\cdot\displaystyle \frac{1}{2}+\sqrt{1-b^2}\cdot\displaystyle \frac{\sqrt{3}}{2}$</td> |
- | <td class="ntext">$\textrm{f) }$</td> | + | |
- | <td class="ntext">$\cos{\left( v-\displaystyle \frac{\pi}{3} \right)}$</td> | + | |
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
</table> | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning a) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga a) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_4a.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning b) </DIV> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga b) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_4b.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning c) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga c) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_4c.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning d) </DIV> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga d) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_4d.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning e) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga e) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_4e.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning f) </DIV> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga f) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_4f.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | ==Övning 4.3:5== | ||
+ | <div class="ovning"> | ||
+ | För en spetsig vinkel \,v\, i en triangel gäller att \,\sin{v}=\displaystyle \frac{5}{7}\,. Bestäm \,\cos{v}\, och \,\tan{v}\,. | ||
</div> | </div> | ||
Rad 220: | Rad 420: | ||
<div class=NavHead>Facit </div> | <div class=NavHead>Facit </div> | ||
<div class=NavContent> | <div class=NavContent> | ||
- | Facit till alla delfrågorna<br \> | ||
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">\textrm{a) }</td> | + | <td class="ntext" width="100%">$\cos{v}=\displaystyle \frac{2\sqrt{6}}{7}\quad$ och $\quad\tan{v}=\displaystyle \frac{5}{2\sqrt{6}}\,$.</td> |
- | <td class="ntext">1-b^2</td> | + | |
- | <td class="ntext">$\textrm{b) }$</td> | + | |
- | <td class="ntext">$\sqrt{1-b^2}$</td> | + | |
- | <td class="ntext">$\textrm{c) }$</td> | + | |
- | <td class="ntext">$2b\sqrt{1-b^2}$</td> | + | |
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning </div> | ||
+ | <div class=NavContent> | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_5-1(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_5-2(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | ==Övning 4.3:6== | ||
+ | <div class="ovning"> | ||
+ | <table width="100%" cellspacing="10px"> | ||
+ | <tr align="left" valign="top"> | ||
+ | <td class="ntext">a)</td> | ||
+ | <td class="ntext" width="100%">Bestäm \ \sin{v}\ och \ \tan{v}\ om \ \cos{v}=\displaystyle \frac{3}{4}\ och \ \displaystyle \frac{3\pi}{2} \leq v \leq 2\pi\,.</td> | ||
+ | </tr> | ||
+ | <tr align="left" valign="top"> | ||
+ | <td class="ntext">b)</td> | ||
+ | <td class="ntext" width="100%">Bestäm \ \cos{v}\ och \ \tan{v}\ om \ \sin{v}=\displaystyle \frac{3}{10}\ och \,v\, ligger i den andra kvadranten.</td> | ||
+ | </tr> | ||
+ | <tr align="left" valign="top"> | ||
+ | <td class="ntext">c)</td> | ||
+ | <td class="ntext" width="100%">Bestäm \ \sin{v}\ och \ \cos{v}\ om \ \tan{v}=3\ och \ \pi \leq v \leq \displaystyle \frac{3\pi}{2}\,.</td> | ||
+ | </tr> | ||
+ | <tr><td height="5px"/></tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Facit </div> | ||
+ | <div class=NavContent> | ||
+ | Facit till alla delfrågor | ||
+ | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{d) }$</td> | + | <td class="ntext">a)</td> |
- | <td class="ntext">$2b^2-1$</td> | + | <td class="ntext" width="100%">$\sin{v}=-\displaystyle \frac{\sqrt{7}}{4}\quad$ och \quad\tan{v}=-\displaystyle \frac{\sqrt{7}}{3}\,.</td> |
- | <td class="ntext">$\textrm{e) }$</td> | + | </tr> |
- | <td class="ntext">$\sqrt{1-b^2}\cdot\displaystyle \frac{1}{\sqrt{2}} + b\cdot \displaystyle \frac{1}{\sqrt{2}} $</td> | + | <tr><td height="5px"/></tr> |
- | <td class="ntext">$\textrm{f) }$</td> | + | <tr align="left"> |
- | <td class="ntext">$b\cdot\displaystyle \frac{1}{2}+\sqrt{1-b^2}\cdot\displaystyle \frac{\sqrt{3}}{2}$</td> | + | <td class="ntext">b)</td> |
+ | <td class="ntext" width="100%">$\cos{v}=-\displaystyle \frac{\sqrt{91}}{10}\quad och \quad\tan{v}=-\displaystyle \frac{3}{\sqrt{91}}\,$.</td> | ||
+ | </tr> | ||
+ | <tr><td height="5px"/></tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">c)</td> | ||
+ | <td class="ntext" width="50%">$\sin{v}=-\displaystyle \frac{3}{\sqrt{10}}\quad och \quad\cos{v}=-\displaystyle \frac{1}{\sqrt{10}}\,$.</td> | ||
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
Rad 245: | Rad 491: | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning a </div> | + | <div class=NavHead>Lösning a) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga a<br />[[Bild:4_3_3a.gif]] | + | Lösning till delfråga a) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_6a-1(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_6a-2(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning b </DIV> | + | <div class=NavHead>Lösning b) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga b<br />[[Bild:4_3_3b.gif]] | + | Lösning till delfråga b) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_6b-1(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_6b-2(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning c) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga c) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_6c-1(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_6c-2(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | ==Övning 4.3:7== | ||
+ | <div class="ovning"> | ||
+ | Bestäm \ \sin{(x+y)}\ om | ||
+ | <table width="100%" cellspacing="10px"> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">a)</td> | ||
+ | <td class="ntext" width="100%">\sin{x}=\displaystyle \frac{2}{3}\,, \ \sin{y}=\displaystyle \frac{1}{3}\ och \,x\,, \,y\, är vinklar i första kvadranten.</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">b)</td> | ||
+ | <td class="ntext" width="100%">\cos{x}=\displaystyle \frac{2}{5}\,, \ \cos{y}=\displaystyle \frac{3}{5}\ och \,x\,, \,y\, är vinklar i första kvadranten.</td> | ||
+ | </tr> | ||
+ | <tr><td height="5px"/></tr> | ||
+ | </table> | ||
+ | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning c </div> | + | <div class=NavHead>Facit </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga c<br />[[Bild:4_3_3c.gif]] | + | Facit till alla delfrågor |
+ | <table width="100%" cellspacing="10px"> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">a)</td> | ||
+ | <td class="ntext" width="100%">\sin{(x+y)}=\displaystyle \frac{4\sqrt{2}+\sqrt{5}}{9}</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext">b)</td> | ||
+ | <td class="ntext" width="100%">\sin{(x+y)}=\displaystyle \frac{3\sqrt{21}+8}{25}</td> | ||
+ | </tr> | ||
+ | <tr><td height="5px"/></tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning d </DIV> | + | <div class=NavHead>Lösning a) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga d<br />[[Bild:4_3_3d.gif]] | + | Lösning till delfråga a) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_7a.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning b) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga b) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_7b.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | ==Övning 4.3:8== | ||
+ | <div class="ovning"> | ||
+ | Visa följande trigonometriska samband | ||
+ | <table width="100%" cellspacing="10px"> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext>a)</td> | ||
+ | <td class="ntext width="100%">\tan^2v=\displaystyle\frac{\sin^2v}{1-\sin^2v}</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext>b)</td> | ||
+ | <td class="ntext width="100%">\displaystyle \frac{1}{\cos v}-\tan v=\frac{\cos v}{1+\sin v}</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext>c)</td> | ||
+ | <td class="ntext width="100%">\tan\displaystyle\frac{u}{2}=\frac{\sin u}{1+\cos u}</td> | ||
+ | </tr> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext>d)</td> | ||
+ | <td class="ntext width="100%">\displaystyle\frac{\cos (u+v)}{\cos u \cos v}= 1- \tan u \tan v</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning e </div> | + | <div class=NavHead>Lösning a) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga e<br />[[Bild:4_3_3e.gif]] | + | Lösning till delfråga a) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_8a.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> | ||
<div class=NavFrame style="CLEAR: both"> | <div class=NavFrame style="CLEAR: both"> | ||
- | <div class=NavHead>Lösning f </DIV> | + | <div class=NavHead>Lösning b) </div> |
<div class=NavContent> | <div class=NavContent> | ||
- | Lösning till delfråga f<br />[[Bild:4_3_3f.gif]] | + | Lösning till delfråga b) |
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_8b.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning c) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga c) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_8c-1(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_8c-2(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning d) </div> | ||
+ | <div class=NavContent> | ||
+ | Lösning till delfråga a) | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_8d.gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | ==Övning 4.3:9== | ||
+ | <div class="ovning"> | ||
+ | <table width="100%" cellspacing="10px"> | ||
+ | <tr align="left"> | ||
+ | <td class="ntext> | ||
+ | Visa "Feynmans likhet" | ||
+ | \cos 20^\circ \cdot \cos 40^\circ \cdot \cos 80^\circ = \displaystyle\frac{1}{8}\,\mbox{.} | ||
+ | (Ledtråd: Använd formeln för dubbla vinkeln på \,\sin 160^\circ\,.) | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | </div> | ||
+ | |||
+ | <div class=NavFrame style="CLEAR: both"> | ||
+ | <div class=NavHead>Lösning </div> | ||
+ | <div class=NavContent> | ||
+ | <table width="100%"> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_9-1(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td align="center"> | ||
+ | [[Bild:4_3_9-2(2).gif]] | ||
+ | </td> | ||
+ | </tr> | ||
+ | </table> | ||
</div> | </div> | ||
</div> | </div> |
Nuvarande version
Innehåll[göm] |
[redigera] Övning 4.3:1
Bestäm de vinklar \,v\, mellan \,\displaystyle \frac{\pi}{2}\, och \,2\pi\, som uppfyller
a) | \cos{v}=\cos{\displaystyle \frac{\pi}{5}} | b) | \sin{v}=\sin{\displaystyle \frac{\pi}{7}} | c) | \tan{v}=\tan{\displaystyle \frac{2\pi}{7}} |
Facit
Facit till alla delfrågor
a) | v = \displaystyle \frac{9\pi}{5} | b) | v = \displaystyle \frac{6\pi}{7} | c) | v = \displaystyle \frac{9\pi}{7} |
[redigera] Övning 4.3:2
Bestäm de vinklar \,v\, mellan 0 och \,\pi\, som uppfyller
a) | \cos{v} = \cos{\displaystyle \frac{3\pi}{2}} | b) | \cos{v} = \cos{ \displaystyle \frac{7\pi}{5}} |
Facit
Facit till alla delfrågor
a) | v=\displaystyle \frac{\pi}{2} | b) | v=\displaystyle \frac{3\pi}{5} |
[redigera] Övning 4.3:3
Antag att \,-\displaystyle \frac{\pi}{2} \leq v \leq \displaystyle \frac{\pi}{2}\, och att \,\sin{v} = a\,. Uttryck med hjälp av \,a
a) | \sin{(-v)} | b) | \sin{(\pi-v)} |
c) | \cos{v} | d) | \sin{\left(\displaystyle \frac{\pi}{2}-v\right)} |
e) | \cos{\left( \displaystyle \frac{\pi}{2} + v\right)} | f) | \sin{\left( \displaystyle \frac{\pi}{3} + v \right)} |
Facit
Facit till alla delfrågor
a) | -a | b) | a |
c) | \sqrt{1-a^2} | d) | \sqrt{1-a^2} |
e) | -a | f) | \displaystyle \frac{\sqrt{3}}{2}\sqrt{1-a^2}+\displaystyle \frac{1}{2}\cdot a |
[redigera] Övning 4.3:4
Antag att \,0 \leq v \leq \pi\, och att \,\cos{v}=b\,. Uttryck med hjälp av \,b\,
a) | \sin^2{v} | b) | \sin{v} |
c) | \sin{2v} | d) | \cos{2v} |
e) | \sin{\left( v+\displaystyle \frac{\pi}{4} \right)} | f) | \cos{\left( v-\displaystyle \frac{\pi}{3} \right)} |
Facit
Facit till alla delfrågor
a) | 1-b^2 | b) | \sqrt{1-b^2} |
c) | 2b\sqrt{1-b^2} | d) | 2b^2-1 |
e) | \sqrt{1-b^2}\cdot\displaystyle \frac{1}{\sqrt{2}} + b\cdot \displaystyle \frac{1}{\sqrt{2}} | f) | b\cdot\displaystyle \frac{1}{2}+\sqrt{1-b^2}\cdot\displaystyle \frac{\sqrt{3}}{2} |
[redigera] Övning 4.3:5
För en spetsig vinkel \,v\, i en triangel gäller att \,\sin{v}=\displaystyle \frac{5}{7}\,. Bestäm \,\cos{v}\, och \,\tan{v}\,.
Facit
\cos{v}=\displaystyle \frac{2\sqrt{6}}{7}\quad och \quad\tan{v}=\displaystyle \frac{5}{2\sqrt{6}}\,. |
[redigera] Övning 4.3:6
a) | Bestäm \ \sin{v}\ och \ \tan{v}\ om \ \cos{v}=\displaystyle \frac{3}{4}\ och \ \displaystyle \frac{3\pi}{2} \leq v \leq 2\pi\,. |
b) | Bestäm \ \cos{v}\ och \ \tan{v}\ om \ \sin{v}=\displaystyle \frac{3}{10}\ och \,v\, ligger i den andra kvadranten. |
c) | Bestäm \ \sin{v}\ och \ \cos{v}\ om \ \tan{v}=3\ och \ \pi \leq v \leq \displaystyle \frac{3\pi}{2}\,. |
Facit
Facit till alla delfrågor
a) | \sin{v}=-\displaystyle \frac{\sqrt{7}}{4}\quad och \quad\tan{v}=-\displaystyle \frac{\sqrt{7}}{3}\,. |
b) | \cos{v}=-\displaystyle \frac{\sqrt{91}}{10}\quad och \quad\tan{v}=-\displaystyle \frac{3}{\sqrt{91}}\,. |
c) | \sin{v}=-\displaystyle \frac{3}{\sqrt{10}}\quad och \quad\cos{v}=-\displaystyle \frac{1}{\sqrt{10}}\,. |
[redigera] Övning 4.3:7
Bestäm \ \sin{(x+y)}\ om
a) | \sin{x}=\displaystyle \frac{2}{3}\,, \ \sin{y}=\displaystyle \frac{1}{3}\ och \,x\,, \,y\, är vinklar i första kvadranten. |
b) | \cos{x}=\displaystyle \frac{2}{5}\,, \ \cos{y}=\displaystyle \frac{3}{5}\ och \,x\,, \,y\, är vinklar i första kvadranten. |
Facit
Facit till alla delfrågor
a) | \sin{(x+y)}=\displaystyle \frac{4\sqrt{2}+\sqrt{5}}{9} |
b) | \sin{(x+y)}=\displaystyle \frac{3\sqrt{21}+8}{25} |
[redigera] Övning 4.3:8
Visa följande trigonometriska samband
a) | \tan^2v=\displaystyle\frac{\sin^2v}{1-\sin^2v} |
b) | \displaystyle \frac{1}{\cos v}-\tan v=\frac{\cos v}{1+\sin v} |
c) | \tan\displaystyle\frac{u}{2}=\frac{\sin u}{1+\cos u} |
d) | \displaystyle\frac{\cos (u+v)}{\cos u \cos v}= 1- \tan u \tan v |
[redigera] Övning 4.3:9
Visa "Feynmans likhet" \cos 20^\circ \cdot \cos 40^\circ \cdot \cos 80^\circ = \displaystyle\frac{1}{8}\,\mbox{.}
(Ledtråd: Använd formeln för dubbla vinkeln på \,\sin 160^\circ\,.)
|