" 4."cos theta-cos2 theta=sin3 theta

Prove that : sin theta cos^3 theta - cos theta sin^3 theta = 1/4 sin4theta .

cos theta-cos3 theta+cos5 theta-cos7 theta=4sin theta sin4 theta cos2 theta

Prove the following: 2^(3)sin theta cos theta cos2 theta cos4 theta=sin8 theta

Prove the following : sin theta+ sin 3 theta+ sin 5 theta+sin 7 theta=4 cos theta cos2 theta sin4 theta .

If cos theta =4/5 then sin^2 theta cos theta + cos^2 theta sin theta is equal to :

If sec theta=4 , find the value of cos theta/(4cos^2 theta+3sin^2 theta) .

(cos4 theta+cos3 theta+cos2 theta)/(sin4 theta+sin3 theta+sin2 theta)=cot3 theta

Prove that : (cos4 theta+cos3 theta+cos2 theta)/(sin4 theta+sin3 theta+sin2 theta)=cot3 theta

Simplify: (sin8 theta cos theta-sin6 theta cos3 theta)/(cos2 theta cos theta-sin3 theta sin4 theta)

Smallest positive value of theta satisfying 8sin theta cos2 theta sin3 theta cos4 theta=cos6 theta is