If sinh 9- k sinh k=(k+1)sinh³ k,then k=

If Sinh^-1 √3= log(sec θ+tan θ), then θ=

If z= x+iy such that cos z= 2, then z=

(tan hx/ Sechx-1)+ (sinh x/ sech x+1)

If A= Tanh^-1 (1/2)+ Coth^-1(2), B= sinh(Cosh^-1 9), C= sech²(Tanh^-1 1/2)+cosech²(Coth^-1 3) then

If cosh x= sec θ, then tanh² x/2=

log(x-1+√(x²-2x)(x≥2) is equal to

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=