Complex.Acos(Complex) 方法

定义

命名空间:

System.Numerics

程序集:

System.Runtime.Numerics.dll

Source:

Complex.cs

返回表示指定复数的反余弦值的角度。

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

参数

value

Complex

表示余弦的复数。

返回

Complex

以弧度为单位的角度，它表示 value 的反余弦。

示例

下面的示例演示 Acos 了 方法。 它表明，将 方法返回 Acos 的值传递给 Cos 方法将返回原始 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)

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)

注解

Acos复数的 方法对应于Math.Acos实数的 方法。

方法 Acos 使用以下公式：

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

另请参阅

• Cos(Complex)
• Acos(Double)