Function Reference

ATan

Calculates the arctangent of a number.

ATan ( expression )

Parameters

expression Any valid numeric expression.

Return Value

Returns the trigonometric arctangent of the number. Result is in radians.

Remarks

The result of 4 * ATan(1) is pi.

ACos, ASin, Cos, Sin, Tan

Example

Example 1

#include <MsgBoxConstants.au3>
Example()
Func  Example()
; Assign a Local variable the arcTangent of 0.5.
Local $fArcTan1= ATan (0.5)
; Display the result.
MsgBox ($MB_SYSTEMMODAL,"",$fArcTan1&" rad.")
; Assign a Local constant variable the approximate PI number.
Local Const $PI= 3.141592653589793
; Assign a Local variable the formula to switch from radian to degree (equals to one radian in degree).
Local $fRadToDeg= 180/ $PI
; Assign a Local variable a number in degree.
Local $fArcTan2= $fRadToDeg* ATan (1)
; Display the result.
MsgBox ($MB_SYSTEMMODAL,"",$fArcTan2&" deg.")
EndFunc ;==>Example

Example 2

; Example of using ATan with degrees
#include <Math.au3>
#include <MsgBoxConstants.au3>
Local $fDegree= _Degree (ATan (1))
MsgBox ($MB_SYSTEMMODAL,Default ,"ATan(1) = "&$fDegree&" degrees")