# JavaScript Math atan2( ) Method

Below is the example of the Math atan2() Method.

• Example: When y-coordinate is greater than x-coordinate:

 `<``script` `type``=``"text/javascript"``> ` `       ``document.write(Math.atan2(90, 15));   ` ` `

• Output:
`1.4056476493802699`

The Math.atan2() method is used to return the arctangent of the quotient of its arguments. The Math.atan2() method returns a numeric value between -Π and Π representing the angle theta of an (x, y) point and the positive x-axis. This is the counterclockwise angle, measured in radians, between the positive X-axis, and the point (x, y).

Syntax:

`Math.atan2(value1, value2)`

Parameters: This method accepts two parameters as mentioned above and described below:

• value1: This parameter represents the y-coordintae.
• value2: represents x-coordinate of the point (x,y).

Returns: It returns the arctangent of the quotient of its arguments.

Below examples illustrate the Mathe atan2() method in JavaScript:

• Example 1:
```Input : Math.atan2(90, 15);
Output : 1.4056476493802699```
• Example 2:
```Input : Math.atan2(15, 90);
Output : 0.16514867741462683```

More codes for the above method are as follows:

Program 1: When y-coordinate is smaller than x-coordinate

 `<``script` `type``=``"text/javascript"``> ` `     ``document.write(Math.atan2(15, 90));   ` ` `

Output:

`0.16514867741462683`

Program 2: When y-coordinate is same as x-coordinate

 `<``script` `type``=``"text/javascript"``> ` `     ``document.write(Math.atan2(90, 90));   ` ` `

Output:

`0.7853981633974483`

Supported Browsers:

• Internet Explorer
• Firefox
• Opera
• Safari My Personal Notes arrow_drop_up If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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