Question

Express cos6 theta in terms of sin theta i need a worked out example to solve this

Answer 1

r u indian?

Answer 2

Demoivers theorem and binomial theorem has to be used to solve this.. After simplifying to a step i couldn't simplify the i terms in the equation.. Please help me to solve this

Answer 3

Yes I am..

Answer 4

\[\cos^6\theta~\text{or}~\cos6\theta~?\]

Answer 5

\[ \cos6 \theta \rightarrow \cos2 (3\theta)\]
since \[\cos2\theta=1-2\sin^2\theta \rightarrow \cos2(3\theta)=1-2\sin^2(3\theta)\]

Answer 6

It is cos 6 theta not to the power of 6 theta...