4.2 Övningar
Sommarmatte 1
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Versionen från 29 april 2007 kl. 15.58 (redigera) Annagf (Diskussion | bidrag) (→Övning 4.2:3) ← Gå till föregående ändring |
Versionen från 29 april 2007 kl. 16.05 (redigera) (ogör) Annagf (Diskussion | bidrag) (→Övning 4.2:4) Gå till nästa ändring → |
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Rad 289: | Rad 289: | ||
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{g) }$</td> | + | <td class="ntext">a)$</td> |
<td class="ntext">$\cos{\displaystyle \frac{11\pi}{6}}$</td> | <td class="ntext">$\cos{\displaystyle \frac{11\pi}{6}}$</td> | ||
- | <td class="ntext">$\textrm{h) }$</td> | + | <td class="ntext">b) </td> |
<td class="ntext">$\cos{\displaystyle \frac{11\pi}{3}}$</td> | <td class="ntext">$\cos{\displaystyle \frac{11\pi}{3}}$</td> | ||
+ | <td class="ntext">c) </td> | ||
+ | <td class="ntext">$\tan{\displaystyle \frac{3\pi}{4}}$</td> | ||
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{i) }$</td> | + | <td class="ntext">d) </td> |
- | <td class="ntext">$\tan{\displaystyle \frac{3\pi}{4}}$</td> | + | |
- | <td class="ntext">$\textrm{j) }$</td> | + | |
<td class="ntext">$\tan{\pi}$</td> | <td class="ntext">$\tan{\pi}$</td> | ||
- | <td class="ntext">$\textrm{k) }$</td> | + | <td class="ntext">e) </td> |
<td class="ntext">$\tan{\displaystyle \frac{7\pi}{6}}$</td> | <td class="ntext">$\tan{\displaystyle \frac{7\pi}{6}}$</td> | ||
- | <td class="ntext">$\textrm{l) }$</td> | + | <td class="ntext">f) </td> |
<td class="ntext">$\tan{\left(-\displaystyle \frac{5\pi}{3}\right)}$</td> | <td class="ntext">$\tan{\left(-\displaystyle \frac{5\pi}{3}\right)}$</td> | ||
</tr> | </tr> | ||
Rad 315: | Rad 315: | ||
<table width="100%" cellspacing="10px"> | <table width="100%" cellspacing="10px"> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{g) }$</td> | + | <td class="ntext">a) </td> |
<td class="ntext">$\displaystyle \frac{\sqrt{3}}{2}$</td> | <td class="ntext">$\displaystyle \frac{\sqrt{3}}{2}$</td> | ||
- | <td class="ntext">$\textrm{h) }$</td> | + | <td class="ntext">b) </td> |
<td class="ntext">$\displaystyle \frac{1}{2}$</td> | <td class="ntext">$\displaystyle \frac{1}{2}$</td> | ||
+ | <td class="ntext">c) </td> | ||
+ | <td class="ntext">$-1$</td> | ||
</tr> | </tr> | ||
<tr><td height="5px"/></tr> | <tr><td height="5px"/></tr> | ||
<tr align="left"> | <tr align="left"> | ||
- | <td class="ntext">$\textrm{i) }$</td> | + | <td class="ntext">d) </td> |
- | <td class="ntext">$-1$</td> | + | |
- | <td class="ntext">$\textrm{j) }$</td> | + | |
<td class="ntext">$0$</td> | <td class="ntext">$0$</td> | ||
- | <td class="ntext">$\textrm{k) }$</td> | + | <td class="ntext">e) </td> |
<td class="ntext">$\displaystyle \frac{1}{\sqrt{3}}$</td> | <td class="ntext">$\displaystyle \frac{1}{\sqrt{3}}$</td> | ||
- | <td class="ntext">$\textrm{l) }$</td> | + | <td class="ntext">f) </td> |
<td class="ntext">$\sqrt{3}$</td> | <td class="ntext">$\sqrt{3}$</td> | ||
</tr> | </tr> | ||
Rad 339: | Rad 339: | ||
<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_2_4a.gif]] | + | Lösning till delfråga a<br />[[Bild:4_2_4a-1(2).gif]] |
+ | [[Bild:4_2_4a-2(2).gif]] | ||
</div> | </div> | ||
</div> | </div> |
Versionen från 29 april 2007 kl. 16.05
Innehåll |
Övning 4.2:1
Bestäm längden av sidan som är markerad med $x$ uttryckt med hjälp av de trigonometriska funktionerna.
a) | BILD | b) | BILD | c) | BILD | d) | BILD | e) | BILD | f) | BILD |
Facit
Facit till alla delfrågorna
a) | $x=13\cdot\tan {27 ^\circ} \approx 6,62$ | b) | $x=25\cdot\cos {32 ^\circ} \approx 21,2$ | c) | $x=\displaystyle\frac{14}{\tan {40 ^\circ}} \approx 16,7$ |
d) | $x=\displaystyle\frac{16}{\cos {20 ^\circ}} \approx 17,0$ | e) | $x=\displaystyle\frac{11}{\sin {35 ^\circ}} \approx 19,2$ | f) | $x=\displaystyle\frac{19}{\tan {50 ^\circ}} \approx 15,9$ |
Övning 4.2:2
Bestäm en trigonometrisk ekvation dom vinkeln $v$ uppfyller.
a) | BILD | b) | BILD | c) | BILD | d) | BILD | e) | BILD | f) | BILD |
Facit
Facit till alla delfrågorna
a) | $\tan v=\displaystyle\frac{2}{5}$ | b) | $\sin v=\displaystyle\frac{7}{11}$ |
c) | $\cos v=\displaystyle\frac{5}{7}$ | d) | $\sin v=\displaystyle\frac{3}{5}$ |
e) | $v=30 ^\circ$ | f) | $\sin \displaystyle\frac{v}{2}=\displaystyle\frac{1}{3}$ |
Övning 4.2:3
Bestäm
$\textrm{a) }$ | $\sin{\left(-\displaystyle \frac{\pi}{2}\right)}$ | $\textrm{b) }$ | $\cos{2\pi}$ | $\textrm{c) }$ | $\sin{9\pi}$ |
$\textrm{d) }$ | $\cos{\displaystyle \frac{7\pi}{2}}$ | $\textrm{e) }$ | $\sin{\displaystyle \frac{3\pi}{4}}$ | $\textrm{f) }$ | $\cos{\left(-\displaystyle \frac{\pi}{6}\right)}$ |
Facit
Facit till alla delfrågorna
$\textrm{a) }$ | $-1$ | $\textrm{b) }$ | $1$ | $\textrm{c) }$ | $0$ |
$\textrm{d) }$ | $0$ | $\textrm{e) }$ | $\displaystyle \frac{1}{\sqrt{2}}$ | $\textrm{f) }$ | $\displaystyle \frac{\sqrt{3}}{2}$ |
Övning 4.2:4
Bestäm
a)$ | $\cos{\displaystyle \frac{11\pi}{6}}$ | b) | $\cos{\displaystyle \frac{11\pi}{3}}$ | c) | $\tan{\displaystyle \frac{3\pi}{4}}$ |
d) | $\tan{\pi}$ | e) | $\tan{\displaystyle \frac{7\pi}{6}}$ | f) | $\tan{\left(-\displaystyle \frac{5\pi}{3}\right)}$ |
Facit
Facit till alla delfrågorna
a) | $\displaystyle \frac{\sqrt{3}}{2}$ | b) | $\displaystyle \frac{1}{2}$ | c) | $-1$ |
d) | $0$ | e) | $\displaystyle \frac{1}{\sqrt{3}}$ | f) | $\sqrt{3}$ |
Lösning b
Lösning till delfråga b
Bild:4 2 4b.gif