# Trigonometry Examples

Step 1
Start on the left side.
Step 2
Convert to sines and cosines.
Write in sines and cosines using the quotient identity.
Apply the reciprocal identity to .
Step 3
Simplify.
Multiply the numerator by the reciprocal of the denominator.
Cancel the common factor of .
Step 4
Because the two sides have been shown to be equivalent, the equation is an identity.
is an identity