" 5."sin x+sin3x+sin5x+sin7x=4cos x cos2x sin4x

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

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

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

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

show that sin x+sin 3x +sin 5x +sin 7x =4 sin 4x cos 2x cos x .

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

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

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

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