

1. 
Use the unit circle to find sec (180°). 


A. 
1 
B. 
0 


C. 
1 
D. 
undefined 


Hint 


2. 
Use the unit circle to find the value of cos 120°. 


A. 

B. 



C. 

D. 
2 


Hint 


3. 
Find the value of for an angle in standard position if a point with coordinates (12, 5) lies on its terminal side. 


A. 

B. 



C. 

D. 



Hint 


4. 
Suppose is an angle in standard position whose terminal side lies in Quadrant II. If , find 


A. 

B. 



C. 

D. 



Hint 


5. 
The terminal side of one angle in standard position contains the point with coordinates (3, 2). The terminal side of another angle in standard position contains the point with coordinates (3, 2). Compare the tangents of these angles. 


A. 
They are equal. 
B. 
They are not equal. 


C. 
One does not exist. 
D. 
One is twice the other. 


Hint 

