" 12The value of "(cot(x)/(2)-tan(x)/(2))^(2)(1-2tan x cot2x)" is "

The value of (cot((x)/(2))-tan(x)/(2))^(2)(1-2tan x cot2x) is 1 (b) 2(c)3(d)4

tan x+cot x=2

The valur of (cot x- tan x)/(cot 2x) is

The value of tan(pi+x)tan(pi-x)cot^(2)x is

tan^(2)x+cot^(2)x=2

sin 2x (tan x + cot x) = ?

The value of the expression on (cot x -tan x)/(cot2 x ) is :

cot^(2) x + tan^(2) x

The value of 2tan^(-1)(cos ec tan^(-1)x-tan cot^(-1)x) is equal to (a)cot ^(-1)x( b ) (cot^(-1)1)/(x) (c)tan ^(-1)x (d) none of these