# Trigonometric Substitution Triangles

## Homework Statement

This may be basic, but how do you know which part of an integration problem fill the up the triangle values for trig substitution?

tiny-tim
Homework Helper
Welcome to PF!

Hi CpE Maj! Welcome to PF!
This may be basic, but how do you know which part of an integration problem fill the up the triangle values for trig substitution?

I don't understand.

Can you give an example?