If `tan^(-1)x=A` then find `secA`

If xepsilon(-1,1) and 2tan^(-1)x=tan^(-1)y then find y in term of x .

If tan1^(@)tan2^(@)tan3^(@)tan4^(@). . .tan89^(@)=x^(2)-8 , then find the value of x.

If y=tan^(-1)((1-x)/(1+x)) , find (dy)/(dx) .

Find the derivative of x tan^(-1) x with respect to 'x'

If tan(x+y)+tan(x-y)=1 , find (dy)/(dx) .

If tan (x-A)tan (x-B)+tan (x-B)tan (x-C)+tan(x-C)tan (x-A)=1 and A,B and C are the angles of triangle ABC then find x

If tan^(-1)((x-1)/(x-2))+tan^(-1)((x+1)/(x+2))=pi/4, then find the value of xdot

"If "y=(tan x)^((tan x)^(tan x))," then find "(dy)/(dx).

"If "y=(tan x)^((tan x)^(tan x))," then find "(dy)/(dx).

If y = tan ^(-1) (sec x + tan x) , " find " (d^(2) y)/( dx^(2)) at x = (pi)/(4)