Practice Page
Directions: Do NOT use your calculator for these problems. Choose the best answers.

1.
The value of cos 390º is equal to the value of

Choose:
 
sin 30º
sin 60º
-sin 30º
-sin 60º

 

 

2.
Write cos 280º as a positive acute angle.

Choose:
 
cos 10º
cos 20º
cos 80º
cos 85º

 

 

3.
Write tan(-110º) as a positive actue angle.

Choose:
 
tan 10º
tan 20º
tan 30º
tan 70º

 

 

4.
Give an exact value for pracre18.

Choose:
 
1
2
1/2
-1/2

 

 

5.
If θ is an angle in standard position and B(-3,4) is a point on the terminal side of the angle, what is the value of sinθ ?

Choose:
 
3/5
-3/5
4/5
-4/5

 

 

6.
Find the exact value of secθ for angle θ in standard position if the point (-5,4) lies on its terminal side.

Choose:
 
pracre7
pracre8
-4/5
-5/4

 

 

7.
The line y = 3x creates an acute angle θ when it crosses the x-axis. Find the exact value of secθ.

Choose:
 
pracre11
pracre12
pracre13
pracre14

 

 

8.
A circle centered at the origin has a radius of 13 units. The terminal side of angle θ intercepts the circle in Quadrant II at point C. The y-coordinate of point C is 5. What is the value of cosθ ?

Choose:
 
5/13
-5/13
12/13
-12/13

 

 

9.
Draw and label all of the sides and angles of a reference triangle for 150º. The terminal side of the angle will be a segment of length 10 units.
 

 

 

10.
Draw and label all of the sides and angles of a reference triangle for -135º. The terminal side of the angle will be a segment of length 4 units.
 


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