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

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

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

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

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

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

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

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

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

Prove that (sin 7 x - sin 5x-sin3x +sin x)/(cos 7x-cos5x+cos3 x-cos x)=tan 2x

Prove that: sin 3x + sin 2x - sin x = 4 sin x cos x/2 cos (3x)/2