A. Sinh-1 (x-1)
B. Sinh-1 (x+1)
C. Cosh-1 (x-1)
D. Cosh-1 (x+1)
2 cosh 3 cosh 5=
If coth x= sec θ, then cosech x=
If y= 1/2 Cosech-1 (1/2x√(1+x2)), then x=
If sinh x= cos θ and sin θ=2/3 then cosh x=