" (i) "tan^(-1)x+cot^(-1)((1+x)/(1-x))=(pi)/(4)

cot(tan^(-1)x+cot^(-1)x)

3tan^(-1)x+cot^(-1)x=pi

tan^(-1)(cot4x)

If tan^(-1)((x-1)/(x-2))+cot^(-1)((x+2)/(x+1))=(pi)/(4) , find x.

Prove that : (i) tan^(-1) x + cot^(-1)( x+1) = tan^(-1) (x^(2)+x+1) (ii) cot^(-1) 3 + "cosec"^(-1) sqrt(5) = pi/4

tan^(-1)(cot x)+cot^(-1)(tan x)

Which of the following statement is(are) true or false: (i) tan^(-1)(1)=(pi)/(4) (ii) "sin"^(-1)(pi)/(2)= not defined (iii) tan^(-1)x="cot"^(-1)(1)/(x) (iv) "cosec"^(-1)x="sin"^(-1)(1)/(x), |x| ge 1

The relation tan^(-1)((1+x)/(1-x))=(pi)/(4)+tan^(-1)x holds true for all

tan^(-1)(x-1)+tan^(-1)(x+1)=(pi)/(4)

tan^(-1)2x+tan^(-1)3x=(pi)/(4)