If `0ltxltpiand cosx+sinx=1/2,` then tan x is equal to

If sinx+cosx=1/5 , then tan 2x is

If sinx+cosx=1/5,0lexlepi, then tan x is equal to

If sinx+cosx=1/5,0lexlepi, then tan x is equal to

int(cosx-sinx)/(1+2sin x cosx)dx is equal to

If x_1 and x_2 are two distinct roots of the equation a cosx + b sinx =c then tan""(x_1 + x_2)/(2) is equal to :

If 3f(cosx)+2f(sinx)=5x , then f^(')(cosx) is equal to (where f^(') denotes derivative with respect to x ) (A) −1/(cosx) (B) 1/(cosx) (C) -1/(sinx) (D) 1/(sinx)