Evaluate the integerals.
`int (1)/(1+tan x) dx`

int(dx)/(1-tan x)

int(1)/(1+tan ^(2)x)dx

int(1-tan x)/(1+tan x)dx

Evaluate the following integrals: int (1)/(sec x + tan x)dx

Prove that int_(0)^(1)tan^(-1)((1)/(1-x+x^(2)))dx=2int_(0)^(1)tan^(-1)xdx. Hence or otherwise,evaluate the integral int tan^(-1)(1-x+x^(2))dx

Evaluate int(1)/(1-tan x)dx

Evaluate: int(1)/(a+b tan x)dx

Evaluate: int(1)/(p+q tan x)dx

Evaluate the following Integrals : int(tan^(-1)x)/(x^(2))dx