To calculate the values of sinh, cosh, and tanh, you only need to know how to calculate the exponential function exp(x). Here is the definition of the three hyperbolic functions:
The hyperbolic sine is a subtraction of exponential:
sinh(x) = (exp(x) - exp(-x))/2
The hyperbolic cosine is a sum:
cosh(x) = (exp(x) + exp(-x))/2
The hyperbolic tangent is the ratio of the previous two hyperbolic functions:
tanh(x) = sinh(x)/cosh(x)
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