introduction-to-trigonometric-ratios-multiple-choice-questions_c

Which of the following is correct?

• Adjacent side, Hypotenuse, Opposite side

• Opposite side, Adjacent side, Hypotenuse

• Hypotenuse, Opposite side, Adjacent side

• Hypotenuse, Adjacent side, Opposite side

In the figure, cos θ =

• a/b

• b/c

• a/c

• c/b

In the figure, find the value of cosθ.

• 3/5

• 5/4

• 4/5

• 3/4

In the figure, find $ x $. (Correct your answer to 3 significant figures.)

• 7.37

• 10.9

• 11.0

• 15.7

If $\cos \theta = \cos 72^\circ - \frac{1}{4} \cos 32^\circ$, find $\theta$. (Correct your answer to 3 significant figures.)

• 0.999

• 1.00

• 84.4°

• 84.434°

If $\cos(3\theta - 20^\circ) = 0.3$, find $\theta$. (Correct your answer to 1 decimal place.)

• 7.0°

• 28.4°

• 30.8°

• 72.5°

If $3\cos(2\theta + 40^\circ) = 2$, find $\theta$. (Correct your answer to 1 decimal place.)

• 4.1°

• 9.1°

• 14.1°

• 19.1°

In the figure, $AXC$ is a straight line. Find $AC$. (Correct your answer to 3 significant figures.)

• 10.3

• 13.0

• 16.2

• 18.8

In the figure, $BCD$ is a straight line. Find $AD$. (Correct your answer to 1 decimal place.)

• 5.5 cm

• 8.2 cm

• 17.0 cm

• 23.4 cm

A pendulum swings back and forth as shown in the figure. Find $\theta$. (Correct your answer to 3 significant figures.)

• 33.6°

• 67.1°

• 78.7°

• 157.4°