function/ATN                                                     function/ATN
 
 NAME
     ATN -- Returns arctangent
 
 ABBREVIATION
     a <shift> T

 SYNOPSIS
     ATN(<number>)

 FUNCTION
     Returns the angle whose tangent is <number>, measured in radians.
 
 INPUTS
     <number> - tangent (number)
 
 RESULT
     Angle measured in radians (numeric).

 EXAMPLES
     None
 
 NOTES
     None
 
 BUGS
     None
 
 SEE ALSO
     None