; Definitions for hyperbolic trigonometry.

; sinh(x); hyperbolic sine of x
sinh=(e^x-e^-x)/2

; cosh(x); hyperbolic cosine of x
cosh=(e^x+e^-x)/2

; tanh(x); hyperbolic tangent of x
tanh=(e^x-e^-x)/(e^x+e^-x)

; coth(x); hyperbolic cotangent of x
coth=(e^x+e^-x)/(e^x-e^-x)

; sech(x); hyperbolic secant of x
sech=2/(e^x+e^-x)

; csch(x); hyperbolic cosecant of x
csch=2/(e^x-e^-x)