" 8."(sin3A+sin A)sin A+(cos3A-cos A)cos A=0

Prove that: (sin3A+sin A)sin A+(cos3A-cos A)cos A=0

Prove that: \ (sin3A+sin A)sin A+(cos3A-cos A)cos A=0

Prove that : (sin3A+sin A)sin A+(cos3A-cos A)cos A=0

Prove that a) (sin3A + sinA)sinA+(cos3A-cosA) cosA=0 b) cos20^(@)cos40^(@)cos80^(@)=1/8 c) (sin8thetacostheta-sin6thetacos3theta)/(cos2thetacostheta-sin3thetasin4theta) = tan2theta

Prove that a) (sin3A + sinA)sinA+(cos3A-cosA) cosA=0 b) cos20^(@)cos40^(@)cos80^(@)=1/8

( sin 3A + sin A) sin A + ( cos 3A- cos A ) cos A =

Prove that: (sin3x+sin x)sin x+(cos3x-cos x)cos x=0

(sin3x + sin x) sin x + (cos3x-cos x) cos x = 0

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

(sin 3x + sin x ) sin x + (cos 3x - cos x) cos x =0