" 8."sin3x+sin x=cos6x+cos4x

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sin3x + sinx = cos6x + cos4x

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

Prove that : (cos 4x sin 3x - cos 2x sin x)/(sin 4x .sin x + cos 6x .cos x) = tan 2x

Integrate : int (sin6x + sin4x) / (cos6x + cos4x) dx .

Prove the following Identities (cos 4x sin 3x - cos 2xsin x)/(sin 4x.sin x +cos 6x.cos x)= tan 2x

Show that (sin 8x cos x - sin 6x cos 3x)/(cos 2x cos x - sin 3x sin 4x) = tan 2x

(" sin 8x cos x- sin 6x cos 3x")/(" cos 2x cos x - sin 4x sin 3x")=

Prove that sin 5 x cos 2x + cos 6 x sin 3 x = sin 8x cos x

8*sin(x/8)*cos(x/2)*cos(x/4)*cos(x/8)= .............. A) 8 sin x B) sin x C) cos x D) 8 cos x