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साबित करें कि : (i) sin 2x + 2 sin 4...

साबित करें कि `:`
(i) ` sin 2x + 2 sin 4x + sin 6x = 4cos^(2) x sin 4x `
(ii)` sin x + sin 3x +sin 5x + sin 7x = 4 cos x cos 2x sin 4x`

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sin 2 x + 2 sin 4x + sin 6x = 4 cos ^(2) x sin 4x

sin 3 x + 2 csin 4x + sin 6x = 4 cos ^(2) x sin 4x

sin 3 x + 2 csin 4x + sin 6x = 4 cos ^(2) x sin 4x

sin 3 x + 2 csin 4x + sin 6x = 4 cos ^(2) x sin 4x

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

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

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