" (iii) "x sin x.

Prove that: (i) sin 3x+"sin" 2x-"sin" x = 4 sin x cos((x)/(2))cos((3x)/(2)) (ii) ("sin" 3x+"sin" x)"sin" x+(cos 3x-cos x)cos x=0.

if y = sin x ^ (sin x ^ (sin x))

underset(x to 0)"Lt" (sin 7x-sin 5x+sin 3x-sin x)/(sin 6x-sin 4x+sin 2x)=

If y = (sin x) ^((sin x) ^((sin x) ^(...oo))), then (dy)/(dx)=

int (sin4x) / (sin x) sin4x sin x

Prove that: (sin 3x + sin x) sin x + (cos 3x -cos x) cos x = 0

Prove that: (sin 3 x +sin x) sin x + (cos 3x - cos x) cos x = 0

2tan2x = (cos x + sin x) / (cos x-sin x) - (cos x-sin x) / (cos x + sin x)