Versionen från 25 juni 2007 kl. 08.10 (redigera) KTH.SE:u1xsetv1 (Diskussion | bidrag) ← Gå till föregående ändring |
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Rad 722: |
Rad 722: |
| <tr><td height="5px"/></tr> | | <tr><td height="5px"/></tr> |
| </table> | | </table> |
| + | </div> |
| + | |
| + | ==Övning 4.3:1== |
| + | <div class="ovning"> |
| + | Bestäm de vinklar $\,v\,$ mellan $\,\displaystyle \frac{\pi}{2}\,$ och $\,2\pi\,$ som uppfyller |
| + | <table width="100%" cellspacing="10px"> |
| + | <tr align="left"> |
| + | <td class="ntext">a)</td> |
| + | <td class="ntext" width="33%">$\cos{v}=\cos{\displaystyle \frac{\pi}{5}}$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="33%">$\sin{v}=\sin{\displaystyle \frac{\pi}{7}}$</td> |
| + | <td class="ntext">c)</td> |
| + | <td class="ntext" width="33%">$\tan{v}=\tan{\displaystyle \frac{2\pi}{7}}$</td> |
| + | </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="33%">$v = \displaystyle \frac{9\pi}{5}$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="33%">$v = \displaystyle \frac{6\pi}{7}$</td> |
| + | <td class="ntext">c)</td> |
| + | <td class="ntext" width="33%">$v = \displaystyle \frac{9\pi}{7}$</td> |
| + | </tr> |
| + | </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_1a.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_1b.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_1c.gif]] |
| + | </td> |
| + | </tr> |
| + | </table> |
| + | </div> |
| + | </div> |
| + | |
| + | ==Övning 4.3:2== |
| + | <div class="ovning"> |
| + | Bestäm de vinklar $\,v\,$ mellan 0 och $\,\pi\,$ som uppfyller |
| + | <table width="100%" cellspacing="10px"> |
| + | <tr align="left"> |
| + | <td class="ntext">a)</td> |
| + | <td class="ntext" width="50%">$\cos{v} = \cos{\displaystyle \frac{3\pi}{2}}$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="50%">$\cos{v} = \cos{ \displaystyle \frac{7\pi}{5}}$</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"> |
| + | <td class="ntext">a)</td> |
| + | <td class="ntext" width="50%">$v=\displaystyle \frac{\pi}{2}$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="50%">$v=\displaystyle \frac{3\pi}{5}$</td> |
| + | </tr> |
| + | <tr><td height="5px"/></tr> |
| + | </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_2a.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_2b.gif]] |
| + | </td> |
| + | </tr> |
| + | </table> |
| + | </div> |
| + | </div> |
| + | |
| + | ==Övning 4.3:3== |
| + | <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 $\,a$ |
| + | <table width="100%" cellspacing="10px"> |
| + | <tr align="left"> |
| + | <td class="ntext">a)</td> |
| + | <td class="ntext" width="50%">$\sin{(-v)}$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="50%">$\sin{(\pi-v)}$</td> |
| + | </tr> |
| + | <tr align="left"> |
| + | <td class="ntext">c)</td> |
| + | <td class="ntext" width="50%">$\cos{v}$</td> |
| + | <td class="ntext">d)</td> |
| + | <td class="ntext" width="50%">$\sin{\left(\displaystyle \frac{\pi}{2}-v\right)}$</td> |
| + | </tr> |
| + | <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><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%">$-a$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="50%">$a$</td> |
| + | </tr> |
| + | <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 align="left"> |
| + | <td class="ntext">e)</td> |
| + | <td class="ntext" width="50%">$-a$</td> |
| + | <td class="ntext">f)</td> |
| + | <td class="ntext" width="50%">$\displaystyle \frac{\sqrt{3}}{2}\sqrt{1-a^2}+\displaystyle \frac{1}{2}\cdot a $</td> |
| + | </tr> |
| + | <tr><td height="5px"/></tr> |
| + | </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_3a.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_3b.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_3c.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_3d.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_3e.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_3f.gif]] |
| + | </td> |
| + | </tr> |
| + | </table> |
| + | </div> |
| + | </div> |
| + | |
| + | ==Övning 4.3:4== |
| + | <div class="ovning"> |
| + | Antag att $\,0 \leq v \leq \pi\,$ och att $\,\cos{v}=b\,$. Uttryck med hjälp av $\,b\,$ |
| + | <table width="100%" cellspacing="10px"> |
| + | <tr align="left"> |
| + | <td class="ntext">a)</td> |
| + | <td class="ntext" width="50%">$\sin^2{v}$</td> |
| + | <td class="ntext">b)</td> |
| + | <td class="ntext" width="50%">$\sin{v}$</td> |
| + | </tr> |
| + | <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><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"> |
| + | <td class="ntext">e)</td> |
| + | <td class="ntext" width="50%">$\sqrt{1-b^2}\cdot\displaystyle \frac{1}{\sqrt{2}} + b\cdot \displaystyle \frac{1}{\sqrt{2}} $</td> |
| + | <td class="ntext">f)</td> |
| + | <td class="ntext" width="50%">$b\cdot\displaystyle \frac{1}{2}+\sqrt{1-b^2}\cdot\displaystyle \frac{\sqrt{3}}{2}$</td> |
| + | </tr> |
| + | <tr><td height="5px"/></tr> |
| + | </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 class=NavFrame style="CLEAR: both"> |
| + | <div class=NavHead>Facit </div> |
| + | <div class=NavContent> |
| + | <table width="100%" cellspacing="10px"> |
| + | <tr align="left"> |
| + | <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> |
| + | </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"> |
| + | <td class="ntext">a)</td> |
| + | <td class="ntext" width="100%">$\sin{v}=-\displaystyle \frac{\sqrt{7}}{4}\quad$ och $\quad\tan{v}=-\displaystyle \frac{\sqrt{7}}{3}\,$.</td> |
| + | </tr> |
| + | <tr><td height="5px"/></tr> |
| + | <tr align="left"> |
| + | <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><td height="5px"/></tr> |
| + | </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_6a-1(2).gif]] |
| + | </td> |
| + | </tr> |
| + | <tr> |
| + | <td align="center"> |
| + | [[Bild:4_3_6a-2(2).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_6b-1(2).gif]] |
| + | </td> |
| + | </tr> |
| + | <tr> |
| + | <td align="center"> |
| + | [[Bild:4_3_6b-2(2).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_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=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="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 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_7a.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_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=NavHead>Lösning a) </div> |
| + | <div class=NavContent> |
| + | Lösning till delfråga a) |
| + | <table width="100%"> |
| + | <tr> |
| + | <td align="center"> |
| + | [[Bild:4_3_8a.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_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> |