## Example 1

This is first in a series of integrals requiring a trig. identity to simplify it.

Evaluate the following:

## Example 2

Try integrating this series of integrals which uses a very basic trig identity. Do you know what it is?

Evaluate the following:

## Example 3

Try integrating this series of integrals which uses a very basic trig identity. Do you know what it is?

Evaluate the following: