b = acos(s) : computes the arc cosine of iFunc object @iFunc/acos function to compute the inverse cosine of data sets (in radians). input: s: object or array (iFunc) output: b: object or array (iFunc) ex: b=acos(a); Version: Aug. 22, 2017 See also iFunc, iFunc/cos, iFunc/acos, iFunc/sin, iFunc/asin, iFunc/tan, iFunc/atan