- #1

- 807

- 8

## Homework Statement

This ( http://www.wolframalpha.com/input/?i=integrate+cos^6+(x)+dx+from+0+to+pi/2 ) is the integral I am trying to evaluate.:

int cos^6 (x) dx from 0 to pi/2

## Homework Equations

(1 + cos(2x))/2 = cos^2 (x)

(1 – cos(2x))/2 = sin^2 (x)

sin^2 (x) + cos^2 (x) = 1

Variable substitution

## The Attempt at a Solution

My (typed-up) work is attached as MyWork.jpg.

I would greatly appreciate it if someone could tell me where I went wrong in my work!