Java atan() 方法

Java Numbers 类

atan() 方法返回指定 double 值的反正切值。

语法

double atan(double d)

参数

d - double 数据类型。

返回值

方法返回指定 double 值的反正切值。

示例

public class Main { 

   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))));
   }
}

运行示例

上面示例编译运行结果如下

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

Java Numbers 类