Trigonometric Identities Exercises
Example 1
Simplify: 
.
Example 2
Find 
Example 3
Find tan-1(-1).
Example 4
Find 
.
Example 5
Find 
Give your answer in radians.
Example 6
Find sec-1(2) in radians.
Example 7
If 
in Quadrant II, what is tan ɵ?
Example 8
If 
in Quadrant II, what is cos ɵ?
Example 9
If 
in Quadrant IV, what is tan ɵ?
Example 10
If 
in Quadrant II, what is sin ɵ?
Example 11
If 
in Quadrant III, what is cos ɵ?
Example 12
If 
in Quadrant I, what is tan ɵ?
Example 13
Use a sum or difference identity to find cos(-15°).
Example 14
Use a sum or difference identity to find sin(15°).
Example 15
Use a sum or difference identity to find sin(255°).
Example 16
Use a sum or difference identity to find sin(285°).
Example 17
Use a sum or difference identity to find cos(195°).
Example 18
Find tan(105°).
Example 19
Find tan(15°).
