The integral `int_(0)^(pi/2)(dx)/(1+cos x)` is equal to

For 0 lt alt 1 ,the value of the integral int_(0)^( pi)(dx)/(1-2a cos x+a^(2)) is:

int _(0) ^(pi) (1 + 2 cos x ) dx equal to :

The integral int_(0)^(pi) x f(sinx )dx is equal to

The integral int_(0)^(pi) x f(sinx )dx is equal to

If int_(0)^((pi)/(2))(dx)/(1+sin x+cos x)=In2, then the value of int_(0)^((pi)/(2))(sin x)/(1+sin x+cos x)dx is equal to:

The Integral int_((pi)/(4))^((3 pi)/(4))(dx)/(1+cos x) is equal to:

The integral int_((pi)/(6))^((5 pi)/(6))(dx)/(1+cos x) is equal to

The value of int_(0)^((pi)/(2))(cos3x+1)/(cos x-1)dx is equal to