int_(0)(x)/(1+cos^(2)x)dx

Evaluate int _(0)^(pi)(x)/(1+ cos^(2)x)dx .

Evaluate int _(0)^(pi)(x)/(1+ cos^(2)x)dx .

Evaluate int _(0)^(pi)(x)/(1+ cos^(2)x)dx .

Prove that int_(0)^(pi)(xsin^(3)x)/(1+cos^(2)x)dx=pi/2(pi-2)

int_(0)^(pi) (sin^(3)x)/(1+cos^(2)x)dx=

int_(0)^(pi) (x)/(1+cos^(2)x)dx=

int_(0)^( pi)(x)/(1+cos^(2)x)dx=

int_(0)^( pi)(sin x)/(1+cos^(2)x)dx =

If A = int_(0)^((pi)/(2))(sin^(3)x)/(1+cos^(2)s)dx and B=int_(0)^((pi)/(2))(cos^(2)x)/(1+sin^(2)x)dx , then (2A)/(B) is equal to