Returns in radians the arc tangent of a numeric expression.
Syntax
ATAN(nExpression)
Returns
Numeric
Arguments
nExpression
Specifies a numeric expression whose arc tangent ATAN( ) returns. nExpression can be any value. The value returned by ATAN( ) can range from –pi/2 through +pi/2 (–1.57079 to 1.57079). The number of decimal places displayed in the value returned by ATAN( ) is determined by SET DECIMALS.
Remarks
Use RTOD( ) to convert radians to degrees.