'Declaration Public Class UltraCalcFunctionATan2 Inherits BuiltInFunctionBase
public class UltraCalcFunctionATan2 : BuiltInFunctionBase
ATAN2(x_ordinate, y_abscissa)
X_ordinate is a number representing the distance along the x-axis of a Cartesian point. It may also be thought of as the adjacent leg of a right triangle, where the right angle is made by dropping a perpendicular line from (x_ordinate, y_abscissa) to the point (x_ordinate, 0) on the x-axis.
Y_abscissa is a number representing the distance along the y-axis of a Cartesian point. It may also be thought of as the opposite leg of the right triangle constructed above.
This variation on the arctangent (or inverse tangent function) calculates for you the angle, theta, made with the x-axis when you extend a line segment from the origin at (0, 0) to your specified coordinates at (x_ordinate, y_abscissa). This line segment can also be seen to be the hypotenuse of a right triangle, or the radius of the circle on which the point, (x_ordinate, y_abscissa), sits on the edge. This function is another way of looking at the trigonometric tangent function value that is useful in many UltraCalc applications because it affords you a more convenient parameterization for some tasks, such as converting from Cartesian to Polar coordinate systems.
The return value of this function is within the range of PI()/2 and -PI()/2 measured in radians. If you need to convert this value into degrees then multiply the result by 180/PI().
ATAN()TAN()Target Platforms: Windows 10, Windows 8.1, Windows 8, 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