Tan
计算数的正切值.
Tan ( expression )
参数
返回值
返回表达式的三角正切值.
备注
1° = pi / 180 弧度.
正切值是"无穷"的, 对于 ... -3PI/2, -PI/2, PI/2, 3PI/2, 5PI/2, ... 等等, 函数往往 为 Pi 的一半返回 1.63317787283838e+016 的倍数.
函数示例
#include <MsgBoxConstants.au3>
Example()
Func Example()
; Assign a Local constant variable the approximate PI number.
Local Const $PI = 3.141592653589793
; Assign a Local variable the tangent of PI / 4.
Local $fTan1 = Tan($PI / 4)
; Display the result.
MsgBox($MB_SYSTEMMODAL, "", $fTan1)
; Assign a Local variable the formula to switch from radian to degree (equals to one degree in radian).
Local $iDegToRad = $PI / 180
; Assign a Local variable the tangent of 90 degrees (firstly converted to radians).
Local $fTan2 = Tan(90 * $iDegToRad)
; Display the result.
MsgBox($MB_SYSTEMMODAL, "", $fTan2)
EndFunc ;==>Example
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该函数可以通过命令 exect 调用
参见:
ATan, Sin, Cos, ASin, ACos
Tan(3.14159265358979/4) ;; 角度45°相切
exect=$var_pi=3.14159265358979||$var_nr=180/$var_pi||Tan(30/$var_nr) GLOBALEXECT<a> ;; 使用角度正切函数进行各种计算
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