# JavaScript Math atan2( ) Method

• Last Updated : 23 Nov, 2020

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

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

## Javascript

 ``

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-coordinate.
• value2: represents x-coordinate of the point (x,y).

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

Below examples illustrate the Math.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

## Javascript

 ``

Output:

```0.16514867741462683
```

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

## Javascript

 ``

Output:

```0.7853981633974483
```

Supported Browsers: