Complex.Acos(Complex) 方法

定義

命名空間:

System.Numerics

組件:

System.Runtime.Numerics.dll

來源:

Complex.cs

傳回角度，這個角度是指定複數的弧線餘弦值。

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

代表餘弦的複數。

傳回

Complex

以弧度測量的角度，這是 value的弧度餘弦值。

範例

下列範例說明 Acos 方法。 它會顯示將 Acos 方法傳回的值傳遞至 Cos 方法會傳回原始 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

複數 Acos 方法會對應至實數的 Math.Acos 方法。

Acos 方法會使用下列公式：

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

另請參閱

• Cos(Complex)
• Acos(Double)