[(cos x-cos y)^(2)+(sin x-sin7x=4cos x cos2x sin4x],[sin x+sin3x+sin5x+sin7x]

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

sin4x=4sin x cos^(3)x-4cos x sin^(3)x

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

sin_( if )x+sin2x+sin3x=cos x+cos2x+cos3x

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

What is the value of [(sin7x- sin5x)/ (cos 7x + cos 5x)]- [(cos 6x-cos 4x)/ (sin 6x + sin 4x)] ? [(sin7x- sin5x)/ (cos 7x + cos 5x)]- [(cos 6x-cos 4x)/ (sin 6x + sin 4x)] का मान क्या है?

(cos 4x sin 3x -cos 2x sin x )/(sin 4x sin x+ cos 6x cos x)= tan 2x

(cos x- cos y) ^(2) + (sin x - sin y) ^(2) =4 sin ^(2) "" ( x-y)/(2)

(cos x- cos y) ^(2) + (sin x - sin y) ^(2) =4 sin ^(2) "" ( x-y)/(2)

(cos x- cos y) ^(2) + (sin x - sin y) ^(2) =4 sin ^(2) "" ( x-y)/(2)