Returns the arctangent of the specified x and y coordinates, in radians between -Pi and Pi, excluding -Pi.
| Name | Type | Description |
| arg1 | number | Is the x-coordinate of the point. |
| arg2 | number | Is the y-coordinate of the point. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
oWorksheet.GetRange("A1").SetValue(oFunction.ATAN2(1, -9));
builder.SaveFile("xlsx", "ATAN2.xlsx");
builder.CloseFile();