" (12) "int(dx)/(1+tan x)

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

" (.) "int(tan x)/(1+tan x)dx

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

The value of int_(0)^((pi)/(2)) (dx)/( 1+ tan x) is

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

Find the following integrals: ( )int sin^(3)x cos^(2)xdx( ii) int(sin x)/(sin(x+a)dx)( iii) int(1)/(1+tan x)dx

int (x tan^-1x dx)

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

Show that : int (dx)/(1+sinx)= tan x- sec x+ c