Sin^-1(-√2/2) + Cos^-1(-1/2)-Tan^-1(-√3)-Cot^-1(1/√3) =

Sec^-1√34/5+ Cosec^-1√17 =

Tan [cos^-1 4/5+tan^-1 2/3] =

If Sec^-1(x/a)- Sec^-1(x/b)= Sec^-1 b- Sec^-1a then x=

Sin^-1(sin 2π/3) =

sin^-1(2cos² x-1)cos^-1(1-2sin² x)

4 Tan^-1 1/5- Tan^-1 1/70+Tan^-1 1/99 =

Tan (π/4+1/2cos^-1a/b) +tan (π/4-1/2cos^-1a/b) =

If 2Tan^-1(cos x) = Tan^-1(2 cosec x) then x=

Tan^-1 1/3+ Tan^-1 1/5+ Tan^-1 1/7+ Tan^-1 1/8 =