# Powers of Trig Functions

## Homework Statement

See attached image

## Homework Equations

Power reducing Identy:
cos^u = (1+Cos2u / 2)

## The Attempt at a Solution

This is a problem that was done as an example (I know it is not complete it is missing the last integration step) but this is where I am getting stuck my question is where in this (3/2) coming from indicated in red in the image I cannot figure it out??? thanks in advance.

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