Complex.Acos(Complex) Complex.Acos(Complex) Complex.Acos(Complex) Complex.Acos(Complex) Method

定義

指定した複素数のアーク コサインである角度を返します。Returns the angle that is the arc cosine of the specified complex number.

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

パラメーター

value
Complex Complex Complex Complex

コサインを表す複素数。A complex number that represents a cosine.

戻り値

value のアーク コサインであるラジアン単位の角度。The angle, measured in radians, which is the arc cosine of value.

次の例を示しています、Acosメソッド。The following example illustrates the Acos method. によって返される値を渡すことを示しています、AcosメソッドをCos返します元Complex値。It shows that passing the value returned by the Acos method to the Cos method returns the original Complex value.

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)

注釈

Acos複素数のメソッドに対応して、Math.Acos実数のメソッド。The Acos method for complex numbers corresponds to the Math.Acos method for real numbers.

Acosメソッドは、次の式を使用します。The Acos method uses the following formula:

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

適用対象

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