b = acosh(s) : computes the inverse hyperbolic cosine of iFunc object @iFunc/acosh function to compute the inverse hyperbolic cosine of data sets. input: s: object or array (iFunc) output: b: object or array (iFunc) ex: b=acosh(a); Version: Nov. 27, 2018 See also iFunc, iFunc/cos, iFunc/acos, iFunc/sin, iFunc/asin, iFunc/tan, iFunc/atan