SD - The Open Source Multivalue String Database
Format: Return_Value = ACOS(Value or Expression)
Return_Value will be the arc cosine of the value or expression. If the passed value or expression is a dynamic array, the the return value will be a dynamic array containing the arc cosine of each of the members of the source array. Return values will be degrees.
SD Basic Functions - ACOS()
OpenQM 2.6.6 documentation for this command is available here. The OpenQM documentation may provide additional context for this command. However, some features in SD have been modified so the OpenQM information may not be 100% applicable to SD.