4.2 Övningar
Aus Förberedande kurs i matematik 1
(Ny sida: {{:4.2 - Figur - Rätvinklig triangel med vinkeln 27° och sidor x och 13}} {{:4.2 - Figur - Rätvinklig triangel med vinkeln 32° och sidor x och 25}} {{:4.2 - Figur - Rätvinklig triang...) |
(Translated links into English) |
||
(Der Versionsvergleich bezieht 24 dazwischen liegende Versionen mit ein.) | |||
Zeile 1: | Zeile 1: | ||
- | { | + | __NOTOC__ |
+ | {| border="0" cellspacing="0" cellpadding="0" height="30" width="100%" | ||
+ | | style="border-bottom:1px solid #000" width="5px" | | ||
+ | {{Ej vald flik|[[4.2 Trigonometriska funktioner|Theory]]}} | ||
+ | {{Vald flik|[[4.2 Övningar|Exercises]]}} | ||
+ | | style="border-bottom:1px solid #000" width="100%"| | ||
+ | |} | ||
- | + | ===Exercise 4.2:1=== | |
- | + | <div class="ovning"> | |
- | + | Using the trigonometric functions, determine the length of the side marked<math>\,x\,</math> | |
- | + | {| width="100%" cellspacing="10px" | |
- | + | ||
- | + | ||
- | { | + | |
+ | |a) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln 27° och sidor x och 13}} | ||
+ | |b) | ||
+ | |width="50%" | | ||
{{:4.2 - Figur - Rätvinklig triangel med vinkeln 32° och sidor x och 25}} | {{:4.2 - Figur - Rätvinklig triangel med vinkeln 32° och sidor x och 25}} | ||
- | + | |- | |
+ | |c) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln 40° och sidor 14 och x}} | ||
+ | |d) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln 20° och sidor 16 och x}} | ||
+ | |- | ||
+ | |e) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln 35° och sidor 11 och x}} | ||
+ | |f) | ||
+ | |width="50%" | | ||
{{:4.2 - Figur - Rätvinklig triangel med vinkeln 50° och sidor x och 19}} | {{:4.2 - Figur - Rätvinklig triangel med vinkeln 50° och sidor x och 19}} | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:1|Solution a |Lösning 4.2:1a|Solution b |Lösning 4.2:1b|Solution c |Lösning 4.2:1c|Solution d |Lösning 4.2:1d|Solution e |Lösning 4.2:1e|Solution f |Lösning 4.2:1f}} | ||
- | + | ===Exercise 4.2:2=== | |
- | + | <div class="ovning"> | |
- | { | + | Determine a trigonometric equation that is satisfied by <math>\,v\,</math>. |
+ | {| width="100%" cellspacing="10px" | ||
- | {{:4.2 - Figur - Rätvinklig triangel med vinkeln v och sidor 5 och 7}} | + | |a) |
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln v och sidor 2 och 5}} | ||
+ | |b) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln v och sidor 70 och 110}} | ||
+ | |- | ||
+ | |c) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln v och sidor 5 och 7}} | ||
+ | |d) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinkeln v och sidor 3 och 5}} | ||
+ | |- | ||
+ | |e) | ||
+ | |width="50%" | {{:4.2 - Figur - Rätvinklig triangel med vinklar v och 60° och sidan 5}} | ||
+ | |f) | ||
+ | |width="50%" | {{:4.2 - Figur - Likbent triangel med toppvinkeln v och sidor 2, 3 och 3}} | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:2|Solution a |Lösning 4.2:2a|Solution b |Lösning 4.2:2b|Solution c |Lösning 4.2:2c|Solution d |Lösning 4.2:2d|Solution e |Lösning 4.2:2e|Solution f |Lösning 4.2:2f}} | ||
- | {{:4.2 | + | ===Exercise 4.2:3=== |
+ | <div class="ovning"> | ||
+ | Determine | ||
+ | {| width="100%" cellspacing="10px" | ||
+ | |a) | ||
+ | |width="33%" | <math>\sin{\left(-\displaystyle \frac{\pi}{2}\right)}</math> | ||
+ | |b) | ||
+ | |width="33%" | <math>\cos{2\pi}</math> | ||
+ | |c) | ||
+ | |width="33%" | <math>\sin{9\pi}</math> | ||
+ | |- | ||
+ | |d) | ||
+ | |width="33%" | <math>\cos{\displaystyle \frac{7\pi}{2}}</math> | ||
+ | |e) | ||
+ | |width="33%" | <math>\sin{\displaystyle \frac{3\pi}{4}}</math> | ||
+ | |f) | ||
+ | |width="33%" | <math>\cos{\left(-\displaystyle \frac{\pi}{6}\right)}</math> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:3|Solution a |Lösning 4.2:3a|Solution b |Lösning 4.2:3b|Solution c |Lösning 4.2:3c|Solution d |Lösning 4.2:3d|Solution e |Lösning 4.2:3e|Solution f |Lösning 4.2:3f}} | ||
- | + | ===Exercise 4.2:4=== | |
+ | <div class="ovning"> | ||
+ | Determine | ||
+ | {| width="100%" cellspacing="10px" | ||
+ | |a) | ||
+ | |width="33%" | <math>\cos{\displaystyle \frac{11\pi}{6}}</math> | ||
+ | |b) | ||
+ | |width="33%" | <math>\cos{\displaystyle \frac{11\pi}{3}}</math> | ||
+ | |c) | ||
+ | |width="33%" | <math>\tan{\displaystyle \frac{3\pi}{4}}</math> | ||
+ | |- | ||
+ | |d) | ||
+ | |width="33%" | <math>\tan{\pi}</math> | ||
+ | |e) | ||
+ | |width="33%" | <math>\tan{\displaystyle \frac{7\pi}{6}}</math> | ||
+ | |f) | ||
+ | |width="33%" | <math>\tan{\left(-\displaystyle \frac{5\pi}{3}\right)}</math> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:4|Solution a |Lösning 4.2:4a|Solution b |Lösning 4.2:4b|Solution c |Lösning 4.2:4c|Solution d |Lösning 4.2:4d|Solution e |Lösning 4.2:4e|Solution f |Lösning 4.2:4f}} | ||
- | {{:4.2 | + | ===Exercise 4.2:5=== |
+ | <div class="ovning"> | ||
+ | Determine | ||
+ | {| width="100%" cellspacing="10px" | ||
+ | |a) | ||
+ | |width="25%" | <math>\cos{135^\circ}</math> | ||
+ | |b) | ||
+ | |width="25%" | <math>\tan{225^\circ}</math> | ||
+ | |c) | ||
+ | |width="25%" | <math>\cos{330^\circ}</math> | ||
+ | |d) | ||
+ | |width="25%" | <math>\tan{495^\circ}</math> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:5|Solution a |Lösning 4.2:5a|Solution b |Lösning 4.2:5b|Solution c |Lösning 4.2:5c|Solution d |Lösning 4.2:5d}} | ||
- | {{:4.2 - Figur - Två trianglar med vinklar 45° resp. 60° och höjdskillnad x}} | + | ===Exercise 4.2:6=== |
+ | <div class="ovning"> | ||
+ | Determine the length of the side marked <math>\,x\,</math>. | ||
+ | {| width="100%" cellspacing="10px" | ||
+ | | | ||
+ | |width="100%" | <center> {{:4.2 - Figur - Två trianglar med vinklar 45° resp. 60° och höjdskillnad x}} </center> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:6|Solution |Lösning 4.2:6}} | ||
- | {{:4.2 - Figur - Älv}} | + | ===Exercise 4.2:7=== |
+ | <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%" | <center> {{:4.2 - Figur - Älv}} </center> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:7|Solution |Lösning 4.2:7}} | ||
- | {{:4.2 - Figur - Hängande stång}} | + | ===Exercise 4.2:8=== |
+ | <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%" | <center> {{:4.2 - Figur - Hängande stång}} </center> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:8|Solution |Lösning 4.2:8}} | ||
- | {{:4.2 - Figur - Bilväg från A till B via P och Q}} | + | ===Exercise 4.2:9=== |
+ | <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. Calculate 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%" | <center> {{:4.2 - Figur - Bilväg från A till B via P och Q}} </center> | ||
+ | |} | ||
+ | </div>{{#NAVCONTENT:Answer|Svar 4.2:9|Solution |Lösning 4.2:9}} |
Aktuelle Version
Theory | Exercises |
Exercise 4.2:1
Using the trigonometric functions, determine the length of the side marked\displaystyle \,x\,
a) |
| b) |
|
c) |
| d) |
|
e) |
| f) |
|
Exercise 4.2:2
Determine a trigonometric equation that is satisfied by \displaystyle \,v\,.
a) |
| b) |
|
c) |
| d) |
|
e) |
| f) |
|
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. Calculate 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.)
|