28-07-2015
Mathematics

Answered

Prove: sin θ - sin θ•cos2 θ = sin3 θ. You must show all work.

Verified Answer :

28-07-2015

sin²α+сos²α=1 sin²α=1-cos²α

sin θ - sin θ•сos²θ = sin³ θ

sin θ - sin θ•сos²θ
=sin θ(1-сos²θ)
=sin θ·sin²θ
=sin³ θ

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