Complex.Acos(Complex) 方法

定義

命名空間:

System.Numerics

組件:

netstandard.dll, System.Runtime.Numerics.dll

來源:

Complex.cs

回傳指定複數的弧餘弦角度。

public:
 static System::Numerics::Complex Acos(System::Numerics::Complex value);

public static System.Numerics.Complex Acos(System.Numerics.Complex value);

static member Acos : System.Numerics.Complex -> System.Numerics.Complex

Public Shared Function Acos (value As Complex) As Complex

參數

value

Complex

一個代表餘弦的複數。

傳回

Complex

角度以弧度為單位，即的 value弧餘弦。

範例

以下範例說明此 Acos 方法。 它顯示將方法回傳 Acos 的值傳給方法 Cos 時，會返回原始 Complex 值。

using System;
using System.Numerics;

public class Example
{
   public static void Main()
   {
      Complex[] values = { new Complex(.5, 2),
                           new Complex(.5, -2),
                           new Complex(-.5, 2),
                           new Complex(-.3, -.8) };
      foreach (Complex value in values)
         Console.WriteLine("Cos(ACos({0})) = {1}", value,
                           Complex.Cos(Complex.Acos(value)));
   }
}
// The example displays the following output:
//       Cos(ACos((0.5, 2))) = (0.5, 2)
//       Cos(ACos((0.5, -2))) = (0.5, -2)
//       Cos(ACos((-0.5, 2))) = (-0.5, 2)
//       Cos(ACos((-0.3, -0.8))) = (-0.3, -0.8)

open System.Numerics

let values =
    [ Complex(0.5, 2.); Complex(0.5, -2.); Complex(-0.5, 2.); Complex(-0.3, -0.8) ]

for value in values do
    printfn $"Cos(ACos({value})) = {Complex.Acos value |> Complex.Cos}"
// The example displays the following output:
//       Cos(ACos((0.5, 2))) = (0.5, 2)
//       Cos(ACos((0.5, -2))) = (0.5, -2)
//       Cos(ACos((-0.5, 2))) = (-0.5, 2)
//       Cos(ACos((-0.3, -0.8))) = (-0.3, -0.8)

Imports System.Numerics

Module Example
   Public Sub Main()
      Dim values() As Complex = { New Complex(.5, 2), 
                                  New Complex(.5, -2),
                                  New Complex(-.5, 2),
                                  New Complex(-.3, -.8) }
      For Each value As Complex In values
         Console.WriteLine("Cos(ACos({0})) = {1}", value, 
                           Complex.Cos(Complex.Acos(value)))
      Next
   End Sub
End Module
' The example displays the following output:
'       Cos(ACos((0.5, 2))) = (0.5, 2)
'       Cos(ACos((0.5, -2))) = (0.5, -2)
'       Cos(ACos((-0.5, 2))) = (-0.5, 2)
'       Cos(ACos((-0.3, -0.8))) = (-0.3, -0.8)

備註

Acos複數的方法對應Math.Acos於實數的方法。

此 Acos 方法使用以下公式：

(-ImaginaryOne) * Log(value + ImaginaryOne * Sqrt(One - value * value))

另請參閱

• Cos(Complex)
• Acos(Double)