sin x+3x+sin5x+sin7x=4cos x cos3x

Prove that : sin x+sin3x+sin5x+sin7x=4cos x\ cos2xsin4x

prove that sin x+sin3x+sin5x+sin7x=4cos x cos2x sin4x

Prove that : sin x+sin3x+sin5x+sin7x=4cos x cos2x sin4x

The fundamental period of (sin x+sin3x+sin5x+sin7x)/(cos x+cos3x+cos5x+cos7x) is (pi)/(k) then k=

Prove that: sin x + sin 3x + sin 5x + sin 7x= 4 cos x cos 2x sin 4x

Prove that sin7x + sin5x + sin3x + sinx = 4cosx cos2x sin4x

Prove that (sin x + sin 3x + sin 5x + sin 7x)/(cos x + cos 3x + cos 5x + cos 7x ) = tan 4x

Prove that (sinx+sin3x+sin5x+sin7x)/(cosx+cos3x+cos5x+cos7x)=tan4x

The period of the function f(x) = (sin x + sin 3x - sin 5x + sin 7x)/(cos x + cos 3x + cos 5x + cos 7x) is

Prove the following: (frac(sinx-sin3x+sin5x-sin7x)(cosx-cos3x-cos5x+cos7x))=cot2x