Java cos()方法

Java Math.cos()方法返回指定double參數值的余弦值。

語法

double cos(double d)

參數

• d - 此方法接受double數據類型的值。

返回值

• 此方法返回指定double值的余弦值。

示例

public class Test {

   public static void main(String args[]) {
      double degrees = 45.0;
      double radians = Math.toRadians(degrees);

      System.out.format("The value of pi is %.4f%n", Math.PI);
      System.out.format("The cosine of %.1f degrees is %.4f%n", degrees, Math.cos(radians));
   }
}

執行上面示例代碼，得到以下結果：

The value of pi is 3.1416
The cosine of 45.0 degrees is 0.7071