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3.10 Hyperbolic Trigonometric Functions

R cosh(T x)
hyperbolic cosine of x (in radians)

R sinh(T x)
hyperbolic sine of x (in radians)

R tanh(T x)
hyperbolic tangent of x (in radians)

R acosh(T x)
inverse hyperbolic cosine (in radians)

R asinh(T x)
inverse hyperbolic cosine (in radians)

R atanh(T x)
inverse hyperbolic tangent (in radians) of x