`int_(0)^( pi)sin^(4)xdx`

int_(0)^( pi)sin^(2)xdx

int_(0)^( pi)sin^(5)xdx

int_(0)^( pi/4)sin^(4)xdx

Evaluate: int_(0)^( pi/2)sin^(4)xdx

int_(0)^(2 pi)sin^(3)xdx

"int_(0)^( pi)x sin^(2)xdx

int_(0)^( pi)x sin^(3)xdx

int_(0)^(2 pi)cos^(4)xdx

valuate the following integrals: int_(0)^( pi)x sin^(2)xdx

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