Ask a New Question

Asked by Kyler

Prove sin(4x)= (4sinxcosx)(2cos(x)^(2)-1
15 years ago

Answers

Answered by drwls
Think of how the right hand side looks like the product of 2 sin(2x) and cos(2x)

The next step should be obvious: use the double angle identity again.
15 years ago
There are no AI answers yet. The ability to request AI answers is coming soon!

Submit Your Answer


We prioritize human answers over AI answers.

If you are human, and you can answer this question, please submit your answer.

Related Questions

How o you solve 4sinxcosx=1 ??? Sin^2xcosx+4sinxcosx+3cosx=0 I'm not even sure where to start. Help please 1. Prove that (f(x+h)-f(x-h))/2=f'(x) 2. Prove that any parabola sastifies the equation (f(x+h)-f(x... Prove that the sum of the vectors from the vertices to the centre of a regular octogon is a zero... Prove that sin(A+B+C+)cos(B+C)-cos(A+B+C)sin(B+C)=sinA How to prove this (e^(2^-1 i3pi) - e^-(2^-1 i3pi))/(2i) = -1 if you could show me this that wo... Prove 3+4+5+...+(n+2) = [n(n+5)]/2 for n>4 Do the first step in a proof by induction. Prove that 20^22 - 17^22 + 4^33 - 1 is divisible by 174. prove that 1+1/4+.........+1/n^2<2-1/n Prove that a^3 ≡ a (mod 3) for every positive integer a. What I did: Assume a^3 ≡ a (mod 3) is...
Submit Your Answer

Question

Prove sin(4x)= (4sinxcosx)(2cos(x)^(2)-1

Ask a New Question
Archives Contact Us Privacy Policy Terms of Use