ATan

首页后退前进

ATan

计算数的反正切值.

ATan ( expression )

参数

expression

任意有效值的表达式.

返回值

返回三角函数的反正切值, 结果为弧度单位.

备注

4 * ATan(1) 的运算结果为 pi (圆周率).

函数示例

示例 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

示例 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")

----------------------------------------

该函数可以通过命令 exect 调用

参见:

Tan, Sin, Cos, ASin, ACos

例子

如何创建一个按钮?

ATan(0.577350269189625)

exect=$var_pi=4*ATan(1)||$var_nd=$var_pi/180||$var_nr=180/$var_pi||$var_na=ATan(0.577350269189625)*$var_nr||$var_nb=ATan(1)*$var_nr||ATan(9999999999999999)/$var_nd GLOBALEXECT<a> ;; 使用弧角函数的各种计算