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# 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:

- A double data types

## Return Value :

- 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.sin(radians))));

       }
    }

This produces following result:

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

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