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

Powm1_sub() Sub Powm1_sub ( Ret As  Double, X As  Double, Y As  Double, Optional Info As  Long  ) x^y - 1 (Subroutine version) Purpose Evaluates x^y - 1 accurately in the sense of relative error when y is very small or x is close to 1. Parameters [out] Ret x^y - 1. [in] X Argument x. [in] Y Argument y. [out] Info (Optional) = 0: Successful exit. = 1: Floating point range error. Reference boost/math/special_functions