## A community for students. Sign up today

Here's the question you clicked on:

## b.vijayalakshmi 3 years ago Using de Moivre’s theorem, express cos 6θ and sin 6θ in powers of cos θ and sin θ. Do i have to use binomial expansion??

• This Question is Open
1. vinrar

yes

2. b.vijayalakshmi

i want full explanation

3. Snapbacklive

$=\cos^{6}+6i \cos^{5}\sin-15\cos^{4}\sin^{2}-20i \cos^{3}\sin^{3}+15\cos^{2}\sin^{4}+6i \cos \sin^{5}-\sin^{6}$.

#### Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy