If `tan x + tan 2x + tan 3x = 0` then which of the following can hold good ?

If tan x+tan2x+tan3x=0 then which of the following can hold good?

int tan x tan 2x tan 3x dx

tan x+tan2x+tan3x=0

tan 5x- tan 3x - tan 2x =

tanx + tan2x + tan3x = tanx tan2x tan3x

Let x_1,x_2,x_3,x_4 be four non zero numbers satisfying the equation tan^-1 (a/x)+tan^-1(b/x)+tan^-1(c/x)+tan^-1(d/x)=pi/2 then which ofthe following relation(s) hold good?

If lim_(x rarr0)((tan x)/(x))^((tan x)/(x-tan x) exists and equal to l , then which of the following is ( are ) correct?

For the function f(x)=e^(e^(x))-tan^(-1)x-3=0 which of the following holds good?