`int_(0)^(pi//2)(dx)/(1+tanx)` is

int_(0)^(pi//2)(dx)/(1+(tanx)^(sqrt(2018)))=

int_(0)^((pi)/2)(dx)/(1+(tanx)^(sqrt(2018)))=

int_(0)^((pi)/2)(dx)/(1+(tanx)^(sqrt(2018)))=

Provethat int_(0)^((pi)/(2))(dx)/(1+tanx)=(pi)/(4)

int_(0)^(pi//2)(dx)/((1+sqrt(tanx)))=(pi)/(4)

int_(0)^(pi//2)(tanx)/((1+tanx))dx=?

Evaluate the following: int_0^(pi/2) dx/(1+tanx)

int_(0)^(pi//2)(1)/((1+tanx))dx=?

Evaluation of definite integrals by subsitiution and properties of its : int_(0)^(pi/2)(tanx)/(1+tanx)dx=...........