# Trig substitution

8 videos
1 skill
We will now do another substitution technique (the other was u-substitution) where we substitute variables with trig functions. This allows us to leverage some trigonometric identities to simplify the expression into one that it is easier to take the anti-derivative of.

### Introduction to trigonometric substitution

VIDEO 8:52 minutes
Introduction to trigonometric substitution

### Another substitution with x=sin (theta)

VIDEO 5:08 minutes

### Integrals: Trig substitution 1

VIDEO 7:38 minutes
Example of using trig substitution to solve an indefinite integral

### Trig and u substitution together (part 1)

VIDEO 8:55 minutes

### Trig and u substitution together (part 2)

VIDEO 5:45 minutes

### Trig substitution with tangent

VIDEO 4:46 minutes

### Integrals: Trig substitution 2

VIDEO 8:11 minutes
Another example of finding an anti-derivative using trigonometric substitution

### Integrals: Trig substitution 3 (long problem)

VIDEO 17:52 minutes
Example using trig substitution (and trig identities) to solve an integral.

### Integration using trigonometric substitution

PRACTICE PROBLEMS
Integration using trigonometric identities