Prove that `Cos^3e Cos 3e + Sin^3e sin 3e =Cos^3 2e `.

Prove that: sin3e sin^(3)e+cos3e cos^(3)e=cos^(3)2e

Prove that: sin3e sin^3e+cos3ecos^3e=cos^3 2e

Prove that : (cos^(3) A + sin^(3) A)/ (cos A + sin A) + (cos^(3) A - sin^(3) A)/(cos A - sin A) = 2

Prove that (sin^3A+cos^3A)/(sin A+cos A)+(sin^3A-cos^3A)/(sin A-cos A)=2

If tan^(2)theta=1-e^(2) prove that sec theta+tan^(3)theta cos ec theta=(2-e^(2))^((3)/(2))

e^(-3x) cos x

cos^3x e^(log sin x)

Prove that: 2 sin^2(3pi)/4+2cos^2pi/4+2s e c^2pi/3=10

If int (sin 3 theta + sin theta ) cos theta e ^(sin theta ) d theta = (A sin ^(3) theta + B cos ^(2) theta + C sin theta + D cos theta +E)e^(sin theta)+F, then: