# Differential Equations problem

1. Oct 4, 2008

### afcwestwarrior

1. The problem statement, all variables and given/known data
y=sinx cosx -cosx y'+(tanx)y=cos^2 x

I know that I'm supposed to see if the Left hand side equals the Right hand side, but I'm having problems differentiating y=sinx cosx -cosx

Yea believe it or not

Last edited: Oct 4, 2008
2. Oct 4, 2008

### rocomath

$$y=\sin x\cos x-\cos x$$ is a product

Product rule: $$(fg)'=fg'+gf'$$

3. Oct 4, 2008

Thanks