4.4 Övningar

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Versionen från 30 april 2007 kl. 14.16 (redigera)
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(Övning 4.4:2)
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Versionen från 30 april 2007 kl. 14.20 (redigera) (ogör)
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(Övning 4.4:2)
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Rad 158: Rad 158:
</td> </td>
<td class="ntext">$\textrm{b) }$</td> <td class="ntext">$\textrm{b) }$</td>
-<td class="ntext">$\left\{ \matrix{+<td class="ntext">
 +$\left\{ \matrix{
x=\displaystyle\frac{\pi}{3}+2n\pi\cr x=\displaystyle\frac{\pi}{3}+2n\pi\cr
-x=\displaystyle\frac{5\pi}{3}+2n\pi } \right.$</td>+x=\displaystyle\frac{5\pi}{3}+2n\pi } \right.$
 +</td>
<td class="ntext">$\textrm{c) }$</td> <td class="ntext">$\textrm{c) }$</td>
-<td class="ntext">$x=n\pi$</td>+<td class="ntext">
 +$x=n\pi$</td>
</tr> </tr>
<tr><td height="5px"/></tr> <tr><td height="5px"/></tr>
<tr align="left"> <tr align="left">
<td class="ntext">$\textrm{d) }$</td> <td class="ntext">$\textrm{d) }$</td>
-<td class="ntext">$\left\{ \matrix{+<td class="ntext">
 +$\left\{ \matrix{
x=\displaystyle\frac{\pi}{20}+\displaystyle\frac{2n\pi}{5}\cr x=\displaystyle\frac{\pi}{20}+\displaystyle\frac{2n\pi}{5}\cr
-x=\displaystyle\frac{3\pi}{20}+\displaystyle\frac{2n\pi}{5} } \right.$</td>+x=\displaystyle\frac{3\pi}{20}+\displaystyle\frac{2n\pi}{5} } \right.$
 +</td>
<td class="ntext">$\textrm{e) }$</td> <td class="ntext">$\textrm{e) }$</td>
<td class="ntext">$\left\{ \matrix{ <td class="ntext">$\left\{ \matrix{
Rad 175: Rad 180:
x=\displaystyle\frac{\pi}{6}+\displaystyle\frac{2}{5}n\pi } \right.$</td> x=\displaystyle\frac{\pi}{6}+\displaystyle\frac{2}{5}n\pi } \right.$</td>
<td class="ntext">$\textrm{f) }$</td> <td class="ntext">$\textrm{f) }$</td>
-<td class="ntext">$\left\{ \matrix{+<td class="ntext">$\left\{ \matrix{x=\displaystyle\frac{\pi}{4}+\displaystyle\frac{2}{3}n\pi\cr
-x=\displaystyle\frac{\pi}{4}+\displaystyle\frac{2}{3}n\pi\cr+
x=\displaystyle\frac{5\pi}{12}+\displaystyle\frac{2}{3}n\pi } \right.$</td> x=\displaystyle\frac{5\pi}{12}+\displaystyle\frac{2}{3}n\pi } \right.$</td>
</tr> </tr>

Versionen från 30 april 2007 kl. 14.20

Övning 4.4:1

För vilka vinklar $v$, där $0 \leq v\leq 2\pi$, gäller att

$\textrm{a) }$ $\sin{v}=\displaystyle \frac{1}{2}$ $\textrm{b) }$ $\cos{v}=\displaystyle \frac{1}{2}$ $\textrm{c) }$ $\sin{v}=1$
$\textrm{d) }$ $\tan{v}=1$ $\textrm{e) }$ $\cos{v}=2$ $\textrm{f) }$ $\sin{v}=-\displaystyle \frac{1}{2}$
$\textrm{g) }$ $\tan{v}=-\displaystyle \frac{1}{\sqrt{3}}$

Övning 4.4:2

Lös ekvationen

$\textrm{a) }$ $\sin{x}=\displaystyle \frac{\sqrt{3}}{2}$ $\textrm{b) }$ $\cos{x}=\displaystyle \frac{1}{2} $ $\textrm{c) }$ $\sin{x}=0$
$\textrm{d) }$ $\sin{5x}=\displaystyle \frac{1}{\sqrt{2}} $ $\textrm{e) }$ $\sin{5x}=\displaystyle \frac{1}{2}$ $\textrm{f) }$ $\cos{3x}=-\displaystyle\frac{1}{\sqrt{2}}$
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