Java Math sin()用法及代码示例

java.lang.Math.sin()返回介于0.0和pi之间的角度的三角正弦。如果参数为NaN或无穷大，则结果为NaN。如果自变量为零，则结果为零，其符号与自变量相同。返回的值将在-1和1之间。

用法:

public static double sin(double a)
Parameter:
a:the value whose sine is to be returned.

返回：
此方法返回参数的正弦值。

范例1：展示java.lang.Math.sin()方法的用法。

// Java program to demonstrate working 
// of java.lang.Math.sin() method 
import java.lang.Math; 
  
class Gfg { 
  
    // driver code 
    public static void main(String args[]) 
    { 
        double a = 30; 
          
        // converting values to radians 
        double b = Math.toRadians(a); 
  
        System.out.println(Math.sin(b)); 
  
        a = 45; 
          
        // converting values to radians 
        b = Math.toRadians(a); 
  
        System.out.println(Math.sin(b)); 
  
        a = 60; 
          
        // converting values to radians 
        b = Math.toRadians(a); 
  
        System.out.println(Math.sin(b)); 
  
        a = 90; 
          
        // converting values to radians 
        b = Math.toRadians(a); 
  
        System.out.println(Math.sin(b)); 
    } 
}

输出：

0.49999999999999994
0.7071067811865475
0.8660254037844386
1.0

范例2：当参数为NaN或无穷大时，显示java.lang.Math.sin()方法的用法。

// Java program to demonstrate working 
// of java.lang.Math.cos() method infinity case 
import java.lang.Math; 
  
public class GFG { 
      
    // Driver code 
    public static void main(String[] args) 
    { 
        double positiveInfinity =  
               Double.POSITIVE_INFINITY; 
        double negativeInfinity =  
               Double.NEGATIVE_INFINITY; 
        double nan = Double.NaN; 
        double result; 
  
        // Here argument is negative infinity, 
        // output will be NaN 
        result = Math.sin(negativeInfinity); 
        System.out.println(result); 
  
        // Here argument is positive infinity, 
        // output will also be NaN 
        result = Math.sin(positiveInfinity); 
        System.out.println(result); 
  
        // Here argument is NaN, output will be NaN 
        result = Math.sin(nan); 
        System.out.println(result); 
    } 
}

输出：

NaN
NaN
NaN

相关用法

注：本文由纯净天空筛选整理自barykrg大神的英文原创作品 Java Math sin() method 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。