C# Math.Sin()用法及代码示例

Math.Sin()是内置的Math类方法，它返回给定双值参数(指定角度)的正弦值。

用法:

public static double Sin(double num)

参数：

num:它是要返回其正弦的角度(以弧度为单位)，并且此参数的类型为System.Double。

返回值：返回System.Double类型的num的正弦值。如果num等于NegativeInfinity，PositiveInfinity或NaN，则此方法返回NaN。

下面的程序来说明Math.Sin()方法。

示例1:演示Math.Sin()方法的用法。

// C# program to demonstrate working 
// Math.Sin() method 
using System; 
   
class Geeks { 
   
    // Main Method 
    public static void Main(String []args) 
    { 
        double a = 30; 
           
        // converting value to radians 
        double b = (a * (Math.PI)) / 180; 
   
        // using method and displaying result 
        Console.WriteLine(Math.Sin(b)); 
        a = 45; 
           
        // converting value to radians 
        b = (a * (Math.PI)) / 180; 
   
        // using method and displaying result 
        Console.WriteLine(Math.Sin(b)); 
        a = 60; 
           
        // converting value to radians 
        b = (a * (Math.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(Math.Sin(b)); 
        a = 90; 
           
        // converting value to radians 
        b = (a * (Math.PI)) / 180; 
   
        // using method and displaying result 
        Console.WriteLine(Math.Sin(b)); 
    } 
}

输出：

0.5
0.707106781186547
0.866025403784439
1

示例2:当参数为NaN或无穷大时，显示Math.Sin()方法的用法。

// C# program to demonstrate working 
// Math.Sin() method in infinity case 
using System; 
  
class Geeks { 
      
    // Main Method 
    public static void Main(String []args) 
    { 
  
        double positiveInfinity = Double.PositiveInfinity; 
                 
        double negativeInfinity = Double.NegativeInfinity; 
                 
                 
        double nan = Double.NaN; 
        double result; 
  
        // Here argument is negative infinity, 
        // output will be NaN 
         result = Math.Sin(negativeInfinity); 
         Console.WriteLine(result); 
  
        // Here argument is positive infinity, 
        // output will also be NaN 
        result = Math.Sin(positiveInfinity); 
        Console.WriteLine(result); 
  
        // Here argument is NaN, output will be NaN 
        result = Math.Sin(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 C# | Math.Sin() Method。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。