Practice Page
Directions: Solve the following problems using your knowledge of cofunctions. Choose the best answers.

1.
cos 10º = sin ____
greenstar

Choose:
 
10º
60º
80º
90º

 

 

2.
tan 50º = ____
greentanstar

Choose:
 
cos 40º
sin 40º
cot 40º
cot 50º

 

 

3.
pracco30
greenstar
Choose:
 
pracco31
rad22
math1
  

 

 

4.
sin(90 - θ) = _____
greentanstar

Choose:
 
sin θ
cos(90 - θ)
cos θ
tan θ

 

 

5.
Find the function value of cot 60º.
greenstar

Choose:
 
pracco38
38
pracco40
2

 

 

6.
Given:
pracco41
find the tan x.
greentanstar

Choose:
 
3/4
4/3
5/4
4/5

 

 

7.
pracco45
greenstar

Choose:
 
sec x
cot x
-tan x
-cot x

 

 

8.
pracco46
greentanstar

Choose:
 
sin2 x
sin x • tan x
csc x
cos x

 

 

9.
Simplify:
pracco47
greenstar

Choose:
 
cos x
sin x
tan x
cot x

 

 

10.
Simplify:
pracco48
greentanstar

Choose:
 
sin x
tan x
cos x
csc x

 

 

11.
pracco49
greenstar

Choose:
 
TRUE
FALSE
cannot be determined

 

 

12.
pracco50
greentanstar

Choose:
 
TRUE
FALSE
cannot be determined

 

 

13.
pracco51
greenstar

Choose:
 
TRUE
FALSE
cannot be determined

 

 

14.
If sin(x + 20) = cos (2x + 10), find x.
greentanstar

Choose:
 
10
20
30
 40

 

 

15.
If tan(4x + 40) = cot (2x - 10), find x.
greenstar

Choose:
 
10
20
30
 40

 


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