Java Number atan() 方法

描述

该方法返回指定 double 值的反正切值。

语法

double atan(double d)

参数

以下是参数的详细信息：

• d - 一个双精度数据类型。

返回值

• 该方法返回指定双精度值的反正切。

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 very very very approximately %.4f%n", Math.PI);
      System.out.format("The arctangent of %.4f is %.4f degrees %n", Math.cos(radians), 
         Math.toDegrees(Math.atan(Math.sin(radians))));
   }
}

这将产生以下结果 −

输出

The value of pi is very very very approximately 3.1416
The arctangent of 0.7071 is 35.2644 degrees