Question

Prove: cos θ - cos θ•sin2 θ = cos3 θ. You must show all work.

Answer 1

@mathmale

Answer 2

@kirbykirby

Answer 3

@Hero

Answer 4

thanks matricked i will give medal and fan

Answer 5

do you mean...?

cos θ - cos θ•sin2 θ
=cos θ ( 1 - sin2 θ )
=cos θ * cos2 θ
=cos3 θ

Answer 6

i meant to write sin^2

Answer 7

and cos^3