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Math.Tan-Methode

.NET Framework 3.5

Andere Versionen

Aktualisiert: November 2007

Gibt den Tangens des angegebenen Winkels zurück.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

public static double Tan(
	double a
)

public static double Tan(
	double a
)

JScript

public static function Tan(
	a : double
) : double

Parameter

a: Typ: System.Double
Ein im Bogenmaß angegebener Winkel.

Rückgabewert

Typ: System.Double
Der Tangens von a. Wenn a gleich NaN, NegativeInfinity oder PositiveInfinity ist, gibt diese Methode NaN zurück.

Hinweise

Der Winkel a muss im Bogenmaß angegeben werden. Multiplizieren Sie den Wert zur Konvertierung von Grad in Bogenmaß mit Math.PI/180.

Beispiele

Im folgenden Beispiel wird das Berechnen des Tangens eines Winkels und das Anzeigen des Werts in der Konsole veranschaulicht.

C++

// This example demonstrates Math.Atan()
//                           Math.Atan2()
//                           Math.Tan()
using System;

class Sample 
{
    public static void Main() 
    {
    double x = 1.0;
    double y = 2.0;
    double angle;
    double radians;
    double result;

// Calculate the tangent of 30 degrees.
    angle = 30;
    radians = angle * (Math.PI/180);
    result = Math.Tan(radians);
    Console.WriteLine("The tangent of 30 degrees is {0}.", result);

// Calculate the arctangent of the previous tangent.
    radians = Math.Atan(result);
    angle = radians * (180/Math.PI);
    Console.WriteLine("The previous tangent is equivalent to {0} degrees.", angle);

// Calculate the arctangent of an angle.
    String line1 = "{0}The arctangent of the angle formed by the x-axis and ";
    String line2 = "a vector to point ({0},{1}) is {2}, ";
    String line3 = "which is equivalent to {0} degrees.";

    radians = Math.Atan2(y, x);
    angle = radians * (180/Math.PI);

    Console.WriteLine(line1, Environment.NewLine);
    Console.WriteLine(line2, x, y, radians);
    Console.WriteLine(line3, angle);
    }
}
/*
This example produces the following results:

The tangent of 30 degrees is 0.577350269189626.
The previous tangent is equivalent to 30 degrees.

The arctangent of the angle formed by the x-axis and
a vector to point (1,2) is 1.10714871779409,
which is equivalent to 63.434948822922 degrees.
*/

// This example demonstrates Math.Atan()
//                           Math.Atan2()
//                           Math.Tan()

import System.*;

class Sample
{
    public static void main(String[] args)
    {
        double x = 1.0;
        double y = 2.0;
        double angle;
        double radians;
        double result;

        // Calculate the tangent of 30 degrees.
        angle = 30;
        radians = angle * (Math.PI / 180);
        result = System.Math.Tan(radians);
        Console.WriteLine("The tangent of 30 degrees is {0}.", 
            System.Convert.ToString(result));

        // Calculate the arctangent of the previous tangent.
        radians = System.Math.Atan(result);
        angle = radians * (180 / Math.PI);
        Console.WriteLine("The previous tangent is equivalent to {0} degrees.",
            System.Convert.ToString(angle));

        // Calculate the arctangent of an angle.
        String line1 = "{0}The arctangent of the angle formed by"
            + " the x-axis and ";
        String line2 = "a vector to point ({0},{1}) is {2}, ";
        String line3 = "which is equivalent to {0} degrees.";

        radians = System.Math.Atan2(y, x);
        angle = radians * (180 / Math.PI);

        Console.WriteLine(line1, Environment.get_NewLine());
        Console.WriteLine(line2, System.Convert.ToString(x), 
            System.Convert.ToString(y), System.Convert.ToString(radians));
        Console.WriteLine(line3, System.Convert.ToString(angle));
    } //main
} //Sample

/*
This example produces the following results:

The tangent of 30 degrees is 0.577350269189626.
The previous tangent is equivalent to 30 degrees.

The arctangent of the angle formed by the x-axis and
a vector to point (1,2) is 1.10714871779409,
which is equivalent to 63.434948822922 degrees.
*/

Plattformen

Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile für Smartphone, Windows Mobile für Pocket PC, Xbox 360

.NET Framework und .NET Compact Framework unterstützen nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen für .NET Framework.

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