If `y=tan^(-1)1/2+tan^(-1)b ,(0

If tan^(-1)x,tan^(-1)y,tan^(-1)z are in A.P the (2y)/(1-y^(2))=

If tan^(-1)x,tan^(-1)y,tan^(-1)z are in A.P then (2y)/(1-y^(2))=

The value of tan^(-1)(1/2tan2A) +tan^(-1)(cotA)+tan^(-1)(cot^3A), for 0 lt A lt pi//4 is a) tan^(-1)2 b) tan^(-1)(cotA) c) 4 tan^(-1)(1) d) 2 tan^(-1)(2)

If tan^(-1) x + tan^(-1) y - tan^(-1) z = 0 , then prove that : x+ y + xyz = z .

tan^(-1)a+tan^(-1)b=(pi)/(2)

If tan^(-1) x + tan^(-1) y + tan ^(-1) z = (pi)/(2) , then value of xy + yz + zx a) -1 b) 1 c) 0 d) None of these

If x<0,\ y<0 such that x y=1 , then write the value of tan^(-1)x+tan^(-1)y .

If x<0,\ y<0 such that x y=1 , then write the value of tan^(-1)x+tan^(-1)y .

if a>b>0 then the value of tan^(-1)((a)/(b))+tan^(-1)((a+b)/(a-b)) is