Acos Acosh Asin Asinh Atan2 Atanh Cosh Cospi Cospi_sub Exp2 Exp2_sub Expm1 Expm1_sub Log10 Log1p Log1p_sub Log2 Log2_sub Powm1 Powm1_sub Sinh Sinpi Sinpi_sub Sqrt1pm1 Sqrt1pm1_sub Tanh

Atanh() Function Atanh ( X As  Double, Optional Info As  Long  ) artanh(x) Purpose Computes the inverse hyperbolic tangent of x. Returns Double artanh(x). Parameters [in] X Argument x. (-1 < X < 1) [out] Info (Optional) = 0: Successful exit. = -1: The argument X had an illegal value. (X < -1, X > 1) = 1: Floating point range error.