

1. 
Solve the equation cos x = . 


A. 
x equals 60°, 300° or any angle coterminal with these angles. 


B. 
x equals 150°, 210° or any angle coterminal with these angles. 


C. 
x equals 30°, 330° or any angle coterminal with these angles. 


D. 
x equals 120°, 240° or any angle coterminal with these angles. 


Hint 


2. 
Evaluate sin (arctan ). Assume that the angle is in Quadrant I. 


A. 

B. 



C. 

D. 



Hint 


3. 
If f = 9 and d = 13, find the measure of . 





A. 
about 43.8° 
B. 
about 55.3° 


C. 
about 34.7° 
D. 
about 46.2° 


Hint 


4. 
A security light is being installed outside a loading dock. The light is mounted 25 feet above the ground. The light must be placed at an angle so that it illuminates a parking lot. If the end of the parking lot is 125 feet from the loading dock, what should be the angle of depression of the light? 


A. 
about 78.5° 
B. 
about 78.7° 


C. 
about 11.5° 
D. 
about 11.3° 


Hint 


5. 
If A = 39° and b = 7.2, find c. 





A. 
about 8.9 units 
B. 
about 5.6 units 


C. 
about 9.3 units 
D. 
about 11.4 units 


Hint 

