- #1

meeklobraca

- 189

- 0

## Homework Statement

Differentiate the identity sin2x = 2sinxcosx to develop the identity for cos2x, in terms on sin x and cos x

## Homework Equations

## The Attempt at a Solution

Im not sure where to start with this one. Should I find the derivative of both sides of the equation, and then where do I go from there? The right side of that equation is 2cos^2x + sin^2x but I am not sure how I can use that.

Your help is appreciated as always!