Question

Simplify cos θ - cos θ sin^2 θ please?

Answer 1

use cos^2 + sin^2 = 1

Answer 2

distribute out your cos, then you'll have my 1st equation to apply

Answer 3

\[\cos θ - \cos θ \sin^2 θ = \cos θ(1 - \sin^2 θ)=\cos θ \times \cos^2 θ = \cos^3 \theta\]

Answer 4

Thank you very much!