'Declaration Public Class UltraCalcFunctionATan Inherits BuiltInFunctionBase
public class UltraCalcFunctionATan : BuiltInFunctionBase
ATAN(value)
Value is a number containing a tangent function value that you want to retrieve the angle of. This function returns an angle of between PI()/2 and -PI()/2. Although the tangent function is undefined for values of PI()/2 and -PI()/2, the return value of this function is rounded to these values if Value is +INF or -INF, respectively.
This function is sometimes referred to as the inverse tangent function or the arctangent.
The angle returned is the principal value, as there exist an uncountable number of alternative angles satisfying the requirement of having Value as their tangent function value, at regular intervals of +/- PI() to either side of this principal value.
If you require a result in degrees, multiply the arctangent by 180/PI().
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2