Question

Which of the following is an equivalent expression to sin θ − (sin θ)(cos²θ)?

Answer 1

$$\sin \theta-(\sin\theta)(\cos^2\theta)=\sin \theta(1-\cos^2\theta)$$

$$=\sin \theta(\sin^2 \theta)=\sin^3 \theta$$

$$\sin \theta-(\sin\theta)(\cos^2\theta)=\sin^3 \theta$$