

1. 
The angle of depression from the top of one building to the top of a neighboring building is 12°. If the buildings are 50 feet apart, what is the difference between the heights of the buildings? Round your answer to the nearest tenth of a foot. 


A. 
48.9 ft 
B. 
235.2 ft 


C. 
10.4 ft 
D. 
10.6 ft 


Hint 


2. 
Find the exact value of sin 405°. 


A. 
 1 
B. 



C. 

D. 



Hint 


3. 
Find the value of sin 87° to the nearest thousandth. 


A. 
19.08 
B. 
0.052 


C. 
0.822 
D. 
0.999 


Hint 


4. 
Libby looked out of her airplane window at a 32° angle with respect to the horizontal, and saw the Sears Tower building in Chicago. If the airplane had an altitude of 4000 feet, how far away were they from being directly over Chicago? 


A. 
9900 ft. 
B. 
1616 ft. 


C. 
6401 ft. 
D. 
2499 ft. 


Hint 


5. 
Solve. 





A. 
A = 16°, B = 74° 


B. 
A = 17°, B = 73° 


C. 
A = 5°, B = 85° 


D. 
A = 16°, B = 164° 


Hint 


6. 
What is the degree measure of the angle through which the hour hand on a clock rotates from 4:00 P.M. to 8:00 P.M.? 


A. 
–90° 
B. 
90° 


C. 
–120° 
D. 
120° 


Hint 


7. 
Find sin 225° by drawing a reference angle. 


A. 

B. 



C. 

D. 
1 


Hint 


8. 
Find sin 315° by drawing a reference angle. 


A. 

B. 
1 


C. 

D. 



Hint 


9. 
What is the period for the graph 


A. 
180° 
B. 
360° 


C. 
45° 
D. 
720° 


Hint 


10. 
What is the period for the graph 


A. 
90° 
B. 
360° 


C. 
45° 
D. 
60° 


Hint 


