sin7x+sin3x=

cos x cos((x)/(2))-cos3x cos((9x)/(2))=sin7x sin8x

Prove that (cos3x+cos7x-cos2x)/(sin 7x-sin3x-sin2x)=cot2x

Lim_(x rarr0)(sin x sin3x)/(x sin7x)=?

Find the value of X if sinx +sin7x =sin4x

(sin x) / (sin2x sin3x) + (sin x) / (sin3x sin4x) + (sin x) / (sin4x sin5x) + .... n

What is the value of [(sin7x- sin5x)/ (cos 7x + cos 5x)]- [(cos 6x-cos 4x)/ (sin 6x + sin 4x)] ? [(sin7x- sin5x)/ (cos 7x + cos 5x)]- [(cos 6x-cos 4x)/ (sin 6x + sin 4x)] का मान क्या है?

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

(sin 7x + sin 3x )/(cos 7x + cos 3x ) = tan 5x.

Prove that (cos 3x +cos 7x - cos 2x )/( sin 7x - sin 3x - sin 2x ) = cot 2x

Solve the following trigonometric equation : sin 7x = sin x + sin 3x .