FUNCTION:  Atn( )
Implemented in version 1.0
 
Atn(Number)
 
The Atn function returns the arctangent for a number.
 
Code:
<% =Atn(45.0) %>
 
Output:
1.54857776146818
 
You can also use a negative number.
 
Code:
<% =Atn(-45.0) %>
 
Output:
-1.54857776146818