# Exam: 250311RR - Trigonometric Functions

Exam: 250311RR - Trigonometric Functions

1. Find the reference angle for 96°.
A. 6°
B. 16°
C. 84°
D. 94°
2. Which of the following equations is true about the right triangle shown above?
3. Given  and , use identities to find sec t.
4. Use a calculator to find the value of the expression sin
places.
A. –0.64
B. 2.21
C. –36.87
D. 126.87
5. Which of these functions, when graphed, is the same as a translation of the graph of y = sin x?
A. y = cot x
B. y = cos x
C. y = tan x
D. y = sec x
6. Use reference angles to find the exact value of the expression . Don't use a calculator.
8. Find the exact value of the expression cos
–1
(–1).
9. In the right triangle below, C is the right angle and the two sides are given. Find cos θ. Give an exact
10. Graph the function
11. Convert the angle  in radians to degrees.
12. A car wheel has a 16-inch radius. Through what angle (to the nearest tenth of a degree) does the wheel
turn when the car rolls forward 3 feet?
A. 128.9°
B. 133.9°
C. 143.9°
D. 138.9°
13. Find a positive angle less than 360° that's coterminal with the angle .
14. Find the radian measure of the central angle of a circle of radius r = 1.3 meters that intercepts an arc of
length s = 2.34 meters.
15. Use a sketch to find the exact value of the expression .
16. Draw the angle below in standard position.
17. Find a cofunction with the same value as tan 52°.
A. cot 38°
B. cot 142°
C. sec 52°
D. cot 52°
18. Find the radian measure of the central angle of a circle with radius r = 1.8 meters that intercepts an arc
s = 4.14 meters.