--- doc/docbase/instrument_scripts/nksp/reference/functions/nksp_atan_function.html	2019/09/16 16:03:36	3601
+++ doc/docbase/instrument_scripts/nksp/reference/functions/nksp_atan_function.html	2019/09/16 16:16:09	3602
@@ -10,6 +10,9 @@
       Calculates and returns the arc tangens of the passed 
       <code lang="nksp">??number??</code>.
     </p>
+    <note>
+      The natural constant &pi; ("pi") is also available as built-in constant <code>~NI_MATH_PI</code>.
+    </note>
 
     <h3>Function Prototype</h3>
     <p/>