# Precalculus Examples

Multiply by .

Factor out of .

Factor out of .

Apply pythagorean identity.

Rewrite as .

Rewrite in terms of sines and cosines.

Apply the product rule to .

One to any power is one.

Write as a fraction with denominator .

Factor out the greatest common factor .

Cancel the common factor.

Rewrite the expression.

Multiply and .

Convert from to .