ATAN
function ATAN(arg1: number = null): number | string | booleanDescription
Returns the arctangent of a number in radians, in the range -Pi/2 to Pi/2.
Parameters
- arg1
numberdefault: null Is the tangent of the angle you want.
Returns
number | string | booleanTry It
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
oWorksheet.GetRange("A1").SetValue(oFunction.ATAN(0.25));