4 Tan^-1 1/5- Tan^-1 1/239 =

The domain of Cosh^-1 3x is

The ascending order of A= Sin^-1(sin 8π/7),B= Cos^-1(cos 8π/7), ), C=Tan^-1(tan 8π/7) is

Cos^-1(63/65) + 2 Tan^-1(1/5) =

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

Let Then which one of the following is true

If cos^-1(3/5) - sin^-1(4/5) = cos^-1(x), then x

If Cos^-1 x= Tan^-1 x, then sin(Cos^-1 x)=

If Tan^-1 (sec x + tan x)=π/4+kx then k=

The domain of Cos^-1 (2/2+sinx) in [0,2π] is