C# MathF.Cos()用法及代码示例

MathF.Cos(Single)是内置的MathF类方法，它返回给定浮点值参数(指定角度)的余弦值。

用法： public static float Cos (float x);

Here, x is the angle(measured in radian) whose cosine is to be returned and the type of this parameter is System.Single.

返回值：此方法将返回System.Single类型的x的余弦值。如果x等于NegativeInfinity，PositiveInfinity或NaN，则此方法返回NaN。

下面的程序来说明上述方法的使用：

示例1:

// C# program to illustrate the 
// MathF.Cos(Single) Method 
using System; 
  
class GFG{ 
  
    // Main Method 
    public static void Main(String[] args) 
    { 
        float a = 45f; 
  
        // converting value to radians 
        float b = (a * (MathF.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(MathF.Cos(b)); 
  
        a = 54f; 
  
        // converting value to radians 
        b = (a * (MathF.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(MathF.Cos(b)); 
        a = 70f; 
  
        // converting value to radians 
        b = (a * (MathF.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(MathF.Cos(b)); 
    } 
}

输出：

0.7071068
0.5877852
0.34202

示例2:当参数为NaN或Infinity时，显示MathF.Cos()方法的用法。

// C# program to illustrate the 
// MathF.Cos(Single) method  
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main(String[] args) 
    { 
  
         // taking infinity values 
        float positiveInfinity = float.PositiveInfinity; 
        float negativeInfinity = float.NegativeInfinity; 
  
        // taking NaN  
        float nan = float.NaN; 
  
        float result; 
  
        // Here argument is negative infinity, 
        // so the output will be NaN 
        result = MathF.Cos(negativeInfinity); 
        Console.WriteLine(result); 
  
        // Here argument is positive infinity, 
        // so the output will also be NaN 
        result = MathF.Cos(positiveInfinity); 
        Console.WriteLine(result); 
  
        // Here argument is NaN, output will be NaN 
        result = MathF.Cos(nan); 
        Console.WriteLine(result); 
    } 
}

输出：

NaN
NaN
NaN

相关用法

注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 MathF.Cos() Method in C# with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。