If Cot^-1 4/3+Cot^-1 5/3= Tan^-1 k, then k=

2 Tan^-1 1/3+Tan^-1 1/7=

Sin (2Tan^-13/4) =

Tan^-1 3/2-Tan^-11/5 =

If tan^-1 2, tan^-13 are two angles of a triangle, then the third angle is

Two angles ofa triangle are Cot^-1 2 and Cot^-1 3.Then the third angle is

The domain of Sinh^-1 2x is

If a= sin(Cot^-1 x)and b= cot(Sin^-1 x) where x>0, then 1/x² – x²=

tan (1/2 cos^-1(0)) =

If θ= Sin^-1 x+ Cos^-1 x+ Tan^-1 x, 0≤x≤1, then the smallest interval in which θ lies is given by