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4.4 Övningar

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Versionen från 30 april 2007 kl. 17.01 (redigera)
Ossiang (Diskussion | bidrag)
(Övning 4.4:3)
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Versionen från 30 april 2007 kl. 17.02 (redigera) (ogör)
Ossiang (Diskussion | bidrag)
(Övning 4.4:2)
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Rad 118: Rad 118:
</div> </div>
-==Övning 4.4:2==+==&Ouml;vning 4.4:2==
<div class="ovning"> <div class="ovning">
L&ouml;s ekvationen L&ouml;s ekvationen
Rad 124: Rad 124:
<tr><td height="5px"/></tr> <tr><td height="5px"/></tr>
<tr align="left"> <tr align="left">
-<td class="ntext">$\textrm{a) }$</td>+<td class="ntext">a)</td>
<td class="ntext">\sin{x}=\displaystyle \frac{\sqrt{3}}{2}</td> <td class="ntext">\sin{x}=\displaystyle \frac{\sqrt{3}}{2}</td>
-<td class="ntext">$\textrm{b) }$</td>+<td class="ntext">b)</td>
<td class="ntext">\cos{x}=\displaystyle \frac{1}{2} </td> <td class="ntext">\cos{x}=\displaystyle \frac{1}{2} </td>
-<td class="ntext">$\textrm{c) }$</td>+<td class="ntext">c)</td>
<td class="ntext">\sin{x}=0</td> <td class="ntext">\sin{x}=0</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">d)</td>
<td class="ntext">\sin{5x}=\displaystyle \frac{1}{\sqrt{2}} </td> <td class="ntext">\sin{5x}=\displaystyle \frac{1}{\sqrt{2}} </td>
-<td class="ntext">$\textrm{e) }$</td>+<td class="ntext">e)</td>
<td class="ntext">\sin{5x}=\displaystyle \frac{1}{2}</td> <td class="ntext">\sin{5x}=\displaystyle \frac{1}{2}</td>
-<td class="ntext">$\textrm{f) }$</td>+<td class="ntext">f)</td>
<td class="ntext">\cos{3x}=-\displaystyle\frac{1}{\sqrt{2}}</td> <td class="ntext">\cos{3x}=-\displaystyle\frac{1}{\sqrt{2}}</td>
</tr> </tr>
Rad 151: Rad 151:
<tr><td height="5px"/></tr> <tr><td height="5px"/></tr>
<tr align="left"> <tr align="left">
-<td class="ntext">$\textrm{a) }$</td>+<td class="ntext">a)</td>
<td class="ntext"> <td class="ntext">
$\left\{ \matrix{ $\left\{ \matrix{
Rad 157: Rad 157:
x=\displaystyle\frac{2\pi}{3}+2n\pi } \right.$ x=\displaystyle\frac{2\pi}{3}+2n\pi } \right.$
</td> </td>
-<td class="ntext">$\textrm{b) }$</td>+<td class="ntext">b)</td>
<td class="ntext"> <td class="ntext">
$\left\{ \matrix{ $\left\{ \matrix{
Rad 163: Rad 163:
x=\displaystyle\frac{5\pi}{3}+2n\pi } \right.$ x=\displaystyle\frac{5\pi}{3}+2n\pi } \right.$
</td> </td>
-<td class="ntext">$\textrm{c) }$</td>+<td class="ntext">c)</td>
<td class="ntext"> <td class="ntext">
x=n\pi</td> x=n\pi</td>
Rad 169: Rad 169:
<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">d)</td>
<td class="ntext"> <td class="ntext">
$\left\{ \matrix{ $\left\{ \matrix{
Rad 175: Rad 175:
x=\displaystyle\frac{3\pi}{20}+\displaystyle\frac{2n\pi}{5} } \right.$ x=\displaystyle\frac{3\pi}{20}+\displaystyle\frac{2n\pi}{5} } \right.$
</td> </td>
-<td class="ntext">$\textrm{e) }$</td>+<td class="ntext">e)</td>
<td class="ntext"> <td class="ntext">
$\left\{ \matrix{ $\left\{ \matrix{
Rad 181: Rad 181:
x=\displaystyle\frac{\pi}{6}+\displaystyle\frac{2}{5}n\pi } \right.$ x=\displaystyle\frac{\pi}{6}+\displaystyle\frac{2}{5}n\pi } \right.$
</td> </td>
-<td class="ntext">$\textrm{f) }$</td>+<td class="ntext">f)</td>
<td class="ntext">$\left\{ \matrix{x=\displaystyle\frac{\pi}{4}+\displaystyle\frac{2}{3}n\pi\cr <td class="ntext">$\left\{ \matrix{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>

Versionen från 30 april 2007 kl. 17.02

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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

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

Övning 4.4:3

Lös ekvationen

a) \cos{x}=\cos{\left( \displaystyle \frac{\pi}{6} \right)} b) \sin{x}=\sin{\left( \displaystyle \frac{\pi}{5} \right)}
c) \sin{(x+40^\circ)}=\sin{65^\circ} d) \sin{3x}=\sin{15^\circ}

Övning 4.4:4

Bestäm de vinklar v i intervallet 0^\circ \leq v \leq 360^\circ som uppfyller \cos{\left(2v+10^\circ\right)}=\cos{110^\circ}.

Övning 4.4:5

Lös ekvationen

a) \sin{3x}=\sin{x} b) \tan{x}=\tan{4x} c) \cos{5x}=\cos(x+\pi/5)

Övning 4.4:6

Lös ekvationen

a) \sin x\cdot \cos 3x = 2\sin x b) \sqrt{2}\sin{x}\cos{x}=\cos{x} c) \sin 2x = -\sin x

Övning 4.4:7

Lös ekvationen

a) 2\sin^2{x}+\sin{x}=1 b) 2\sin^2{x}-3\cos{x}=0 c) \cos{3x}=\sin{4x}

Övning 4.4:8

Lös ekvationen

a) \sin{2x}=\sqrt{2}\cos{x} b) \sin{x}=\sqrt{3}\cos{x} c) \displaystyle \frac{1}{\cos^2{x}}=1-\tan{x}
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