h.arsinh

强大的数学工具包

                        * * * * * * * * * * *
                        *   arsinh, arcosh  *
                        *   artanh, arcoth  *
                        * * * * * * * * * * *

        "area sinus hyperbolicus, area cosinus hyperbolicus, 
         area tangens hyperbolicus, area cotangens hyperbolicus"
        SYNTAX: X = arsinh(A)
                X = arcosh(A)
                X = artanh(A)
                X = arcoth(A)

        A is an expression whose value is an integer, a rational
        or a floating point number.

        X is assigned the value of the hyperbolic function at A.

        For X = arcosh(A), A must be >= 1.
        For X = artanh(A), |A| must be < 1.
        For X = arcoth(A), |A| must be > 1.
        

        Example 1: (correct)

                arcosh(4.8)


        Example 2: (incorrect)

                arcoth(0)

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