home.md

@@ -128,6 +128,14 @@ There's no function to get a list of all existing macros in the macrospace. (see
 [SysLoadRexxMacroSpace](SysLoadRexxMacroSpace)  
   
 **Open Object Rexx Math Functions**  
+These functions are from the Oorexx RxMath dll and are (were?) included in the Windows rexxutil library. They enable you to use enhanced mathematical functions and the names are like their corresponding mathematical functions. 
+   
+The precision of calculation depends on:  
+• The value specified when the command is issued  
+• The numeric digits settings of the calling Rexx activity  
+  
+Note: Precision is limited to 16 digits.  
+  
 SysPi   
 SysSqrt  
 SysExp