# Trigonometric substitution module

## Overview

After completing this section, students should be able to do the following.

- Use Pythagorean identities to simplify expressions.
- Substitute trigonometric functions to simiplify integrals.
- Complete the square to change the form of an integral.

# Trigonometric Substitution

## Ximera Module

We integrate by substitution with the appropriate trigonometric function.