4.2 Exercises
From Förberedande kurs i matematik 1
m (Regenerate images and tabs) |
|||
| Line 2: | Line 2: | ||
{| border="0" cellspacing="0" cellpadding="0" height="30" width="100%" | {| border="0" cellspacing="0" cellpadding="0" height="30" width="100%" | ||
| style="border-bottom:1px solid #000" width="5px" | | | style="border-bottom:1px solid #000" width="5px" | | ||
| - | {{Ej vald flik|[[4.2 Trigonometriska funktioner| | + | {{Ej vald flik|[[4.2 Trigonometriska funktioner|Theory]]}} |
| - | {{Vald flik|[[4.2 Övningar| | + | {{Vald flik|[[4.2 Övningar|Exercises]]}} |
| style="border-bottom:1px solid #000" width="100%"| | | style="border-bottom:1px solid #000" width="100%"| | ||
|} | |} | ||
| - | === | + | ===Exercise 4.2:1=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | Using the trigonometric functions, determine the length of the side marked<math>\,x\,</math> | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
| Line 31: | |||
</div>{{#NAVCONTENT:Svar|Svar 4.2:1|Lösning a |Lösning 4.2:1a|Lösning b |Lösning 4.2:1b|Lösning c |Lösning 4.2:1c|Lösning d |Lösning 4.2:1d|Lösning e |Lösning 4.2:1e|Lösning f |Lösning 4.2:1f}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:1|Lösning a |Lösning 4.2:1a|Lösning b |Lösning 4.2:1b|Lösning c |Lösning 4.2:1c|Lösning d |Lösning 4.2:1d|Lösning e |Lösning 4.2:1e|Lösning f |Lösning 4.2:1f}} | ||
| - | === | + | ===Exercise 4.2:2=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | Determine a trigonometric equation that is satisfied by <math>\,v\,</math>. | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:2|Lösning a |Lösning 4.2:2a|Lösning b |Lösning 4.2:2b|Lösning c |Lösning 4.2:2c|Lösning d |Lösning 4.2:2d|Lösning e |Lösning 4.2:2e|Lösning f |Lösning 4.2:2f}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:2|Lösning a |Lösning 4.2:2a|Lösning b |Lösning 4.2:2b|Lösning c |Lösning 4.2:2c|Lösning d |Lösning 4.2:2d|Lösning e |Lösning 4.2:2e|Lösning f |Lösning 4.2:2f}} | ||
| - | === | + | ===Exercise 4.2:3=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | Determine | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
|a) | |a) | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:3|Lösning a |Lösning 4.2:3a|Lösning b |Lösning 4.2:3b|Lösning c |Lösning 4.2:3c|Lösning d |Lösning 4.2:3d|Lösning e |Lösning 4.2:3e|Lösning f |Lösning 4.2:3f}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:3|Lösning a |Lösning 4.2:3a|Lösning b |Lösning 4.2:3b|Lösning c |Lösning 4.2:3c|Lösning d |Lösning 4.2:3d|Lösning e |Lösning 4.2:3e|Lösning f |Lösning 4.2:3f}} | ||
| - | === | + | ===Exercise 4.2:4=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | Determine | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
|a) | |a) | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:4|Lösning a |Lösning 4.2:4a|Lösning b |Lösning 4.2:4b|Lösning c |Lösning 4.2:4c|Lösning d |Lösning 4.2:4d|Lösning e |Lösning 4.2:4e|Lösning f |Lösning 4.2:4f}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:4|Lösning a |Lösning 4.2:4a|Lösning b |Lösning 4.2:4b|Lösning c |Lösning 4.2:4c|Lösning d |Lösning 4.2:4d|Lösning e |Lösning 4.2:4e|Lösning f |Lösning 4.2:4f}} | ||
| - | === | + | ===Exercise 4.2:5=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | Determine | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
|a) | |a) | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:5|Lösning a |Lösning 4.2:5a|Lösning b |Lösning 4.2:5b|Lösning c |Lösning 4.2:5c|Lösning d |Lösning 4.2:5d}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:5|Lösning a |Lösning 4.2:5a|Lösning b |Lösning 4.2:5b|Lösning c |Lösning 4.2:5c|Lösning d |Lösning 4.2:5d}} | ||
| - | === | + | ===Exercise 4.2:6=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | Determine the length of the side marked <math>\,x\,</math>. | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
| | | | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:6|Lösning |Lösning 4.2:6}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:6|Lösning |Lösning 4.2:6}} | ||
| - | === | + | ===Exercise 4.2:7=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | In order to determine the width of a river, we measure from two points, A and B on one side of the straight bank to a tree, C on the opposite side. How wide is the river if the measurements in the figure are correct? | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
| | | | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:7|Lösning |Lösning 4.2:7}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:7|Lösning |Lösning 4.2:7}} | ||
| - | === | + | ===Exercise 4.2:8=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | A rod of length <math>\,\ell\,</math> hangs from two ropes of length <math>\,a\,</math> and <math>\,b\,</math> as shown in the figure. The ropes make angles <math>\,\alpha\,</math> and <math>\,\beta\,</math> with the vertical. Determine a trigonometric equation | |
| + | for the angle <math>\,\gamma\,</math> which the rod makes with the vertical. | ||
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
| | | | ||
</div>{{#NAVCONTENT:Svar|Svar 4.2:8|Lösning |Lösning 4.2:8}} | </div>{{#NAVCONTENT:Svar|Svar 4.2:8|Lösning |Lösning 4.2:8}} | ||
| - | === | + | ===Exercise 4.2:9=== |
<div class="ovning"> | <div class="ovning"> | ||
| - | + | The road from ''A'' to ''B'' consists of three straight parts ''AP'', ''PQ'' and ''QB'', which are 4,0 km, 12,0 km and 5,0 km respectively. The angles marked at ''P'' and ''Q'' in the figure are 30° and 90° respectively. Calcualte the distance as the crow flies from ''A'' to ''B''. (The exercise is taken from the Swedish National Exam in Mathematics, November 1976, although slightly modified.) | |
{| width="100%" cellspacing="10px" | {| width="100%" cellspacing="10px" | ||
| | | | ||
Revision as of 15:27, 3 August 2008
| Theory | Exercises |
Exercise 4.2:1
Using the trigonometric functions, determine the length of the side marked\displaystyle \,x\,
Exercise 4.2:2
Determine a trigonometric equation that is satisfied by \displaystyle \,v\,.
Exercise 4.2:3
Determine
| a) | \displaystyle \sin{\left(-\displaystyle \frac{\pi}{2}\right)} | b) | \displaystyle \cos{2\pi} | c) | \displaystyle \sin{9\pi} |
| d) | \displaystyle \cos{\displaystyle \frac{7\pi}{2}} | e) | \displaystyle \sin{\displaystyle \frac{3\pi}{4}} | f) | \displaystyle \cos{\left(-\displaystyle \frac{\pi}{6}\right)} |
Exercise 4.2:4
Determine
| a) | \displaystyle \cos{\displaystyle \frac{11\pi}{6}} | b) | \displaystyle \cos{\displaystyle \frac{11\pi}{3}} | c) | \displaystyle \tan{\displaystyle \frac{3\pi}{4}} |
| d) | \displaystyle \tan{\pi} | e) | \displaystyle \tan{\displaystyle \frac{7\pi}{6}} | f) | \displaystyle \tan{\left(-\displaystyle \frac{5\pi}{3}\right)} |
Exercise 4.2:5
Determine
| a) | \displaystyle \cos{135^\circ} | b) | \displaystyle \tan{225^\circ} | c) | \displaystyle \cos{330^\circ} | d) | \displaystyle \tan{495^\circ} |
Exercise 4.2:6
Determine the length of the side marked \displaystyle \,x\,.
| |
Exercise 4.2:7
In order to determine the width of a river, we measure from two points, A and B on one side of the straight bank to a tree, C on the opposite side. How wide is the river if the measurements in the figure are correct?
| |
Exercise 4.2:8
A rod of length \displaystyle \,\ell\, hangs from two ropes of length \displaystyle \,a\, and \displaystyle \,b\, as shown in the figure. The ropes make angles \displaystyle \,\alpha\, and \displaystyle \,\beta\, with the vertical. Determine a trigonometric equation for the angle \displaystyle \,\gamma\, which the rod makes with the vertical.
| |
Exercise 4.2:9
The road from A to B consists of three straight parts AP, PQ and QB, which are 4,0 km, 12,0 km and 5,0 km respectively. The angles marked at P and Q in the figure are 30° and 90° respectively. Calcualte the distance as the crow flies from A to B. (The exercise is taken from the Swedish National Exam in Mathematics, November 1976, although slightly modified.)
| |
Loading...