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

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

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

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

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

int_(0)^( pi/4)(dx)/(1+cos x)

int_(0)^(pi//4)(dx)/((1+cos2x))

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

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

Evaluate: int_(0)^(pi) (xsinx)/(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