# Math Help - trig.

1. ## trig.

Prove that the equation is an identity

cosθ(secθ-cosθ)=sin^2 θ

Prove that the equation is an identity

cosθ(secθ-cosθ)=sin^2 θ
Two things you need to know here:

• $\sec\theta = \frac{1}{\cos\theta}$

• $\sin^2\theta = 1-\cos^2\theta$