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# Java - atan2() Method

## Description:

The method Converts rectangular coordinates (x, y) to polar coordinate (r, theta) and returns theta.

## Syntax:

    double atan2(double y, double x)

## Parameters:

Here is the detail of parameters:

- X and Y co-ordinates in double data types

## Return Value :

- Returns theta from polar coordinate (r, theta)

## Example:

    public class Test{
       public static void main(String args[]){
         double x = 45.0;
         double y = 30.0;

         System.out.println( Math.atan2(x, y) );
       }
    }

This produces following result:

    0.982793723247329

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