" 4.(i) "x sin2x

" 4.(i) "int(sin x)/(1-sin^(2)x)dx

Solve (i)7cos^(2)theta+3sin^(2)theta=4(ii)2sin^(2)x+sin^(2)2x=2( iii) 4sin x sin2x sin4x=sin3x

Solve 4sin x sin2x sin4x=sin3x

Solve: 4sin x sin2x sin4x=sin3x

sin ^ (2) 6x-sin ^ (2) 4x = sin2x sin10x

Find the period of the following (i) cos^(4) x (ii) sin ^(2) x

Prove that: (i) "sin"^(2)6x-"sin"^(2)4x="sin" 2x sin 10x (ii) cos^(2)2x-cos^(2)6x="sin" 4x sin 8x .

If I_(1) = int_(0)^(pi) (x sin x)/(1+cos^2x) dx , I_(2) = int_(0)^(pi) x sin^(4)xdx then, I_(1) : I_(2) is equal to

If I_(1) = int_(0)^(pi) (x sin x)/(1+cos^2x) dx , I_(2) = int_(0)^(pi) x sin^(4)xdx then, I_(1) : I_(2) is equal to