`(1-tan x)/(1+tan x)`

Solve tan^(-1)(x-1) +tan^(-1) x +tan^(-1)(x+1)= tan^(-1)(3x) .

Solve: tan ^ (- 1) (x-1) + tan ^ (- 1) x + tan ^ (- 1) (x + 1) = tan ^ (- 1) 3x

Let |{:(tan^(-1)x, tan^(-1)2x, tan^(-1)3x), (tan^(-1)3x, tan^(-1)x, tan^(-1)2x), (tan^(-1)2x, tan^(-1)3x, tan^(-1)x):}|=0 , then the number of values of x satisfying the equation is

Solve for x, tan^(-1)(x-1)+tan^(-1)x +tan^(-1)(x+1) =tan^(-1)3x .

Solve the following equations. tan^-1 (x-1) + tan^-1 x + tan^-1 (x+1) = tan^-1 (3x)

Prove that : 2 tan^(-1) (cosec tan^(-1) x - tan cot^(-1) x) = tan^(-1) x

Prove that : 2 tan^(-1) (cosec tan^(-1) x - tan cot^(-1) x) = tan^(-1) x

Solve the Equation : tan^-1 ((x+1)/(x-1)) + tan^-1 ((x-1)/x) = tan^-1 (-7)

If tan^-1 x + tan^-1 2x + tan^-1 3x = pi , then: