Java - acos() Method

Description

The method returns the arccosine of the specified double value.

Syntax

double acos(double d)

Parameters

Here is the detail of parameters −

• d − A double data type.

Return Value

• This method returns the arccosine of the specified double value.

Example

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 arccosine of %.4f is %.4f degrees %n", Math.cos(radians),
         Math.toDegrees(Math.acos(Math.cos(radians))));
   }
}

This will produce the following result −

Output

The value of pi is 3.1416
The arccosine of 0.7071 is 45.0000 degrees