(1)/(1+cot x)

(1)/(1-cot2x)

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

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

(i) int (1-tanx)/(1+tanx) dx (ii) int (1- cot x)/(1+ cot x) dx

If sin x=(-3)/(11) ,the value of (1-cot x)/(1+tan x)+(1+cot x)/(1-tan x) can be expressed as (a)/(b) ,where a and b are coprime positive integers,then value of a+b is

lim_(x rarr1)(log(1-x))/(cot pi x)

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