" 3."tan^(-1)x=

Prove that 3tan^(-1)x=tan^(-1)((3x-x^3)/(1-3x^2))

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

Formula for 2tan^(-1)x and 3tan^(-1)x

If 3tan^(-1)x +cot^(-1)x=pi , then x equals to

If 3tan^(-1)x+cot^(-1)x=pi , then x equals to ______

If 3tan^(- 1)x+cot^(- 1)x=pi then x equals to ...

If 3tan^(-1)x +cot^(-1)x=pi , then x equals to

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 1 (b) 2 (c) 3 (d) 4