Practice with
Cofunctions
 Topic Index | Algebra2/Trig Index | Regents Exam Prep Center

 

Solve the following problems using your knowledge of cofunctions.

1.


 
 

Choose:

10º
 80º
90º

 


 

2.


 
 

Choose:

cos 40º
 sin 40º
cot 40º

 


 

3.


 
 

Choose:



 

 

4.


 

 

Choose:



 


 

5.

 

Find the function value
of cot 60º.

Choose:



 

 

6.


Given:

find the tan x.

Choose:



 


 

7.


Choose:

sec x
 cot x
-tan x

 

 

8.


Choose:

sin2 x
sin x tan x
csc x

 

 

9.


Simplify:

Choose:

cos x
sin x
tan x

 

 

10.


Simplify:

Choose:

cos x
sin x
tan x

 

 

11.


Choose:

True
False
 cannot be
    determined

 

 

12.


Choose:

True
False
 cannot be
    determined

 


 

13.


Choose:

True
False
 cannot be
    determined

 

 

14.


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

Choose:

x = 10
 x = 20
x = 30

 

 

15.


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

Choose:

x = 10
x = 20
x = 30