# 
## Overview
In Python, the **`numpy.arctan2()` function** is used to return the element-wise arc tangent of $\frac{x1}{x2}$, choosing the quadrant correctly.
## Syntax
```
numpy.arctan2(x1, x2, /, out=None, *, where=True)
```
## Parameter
This function takes the following parameter values:
* **`x1`**: This represents the y-coordinates.
* **`x2`**: This represents the x-coordinates.
* **`out`**: This represents a location where the result is stored. This is optional.
* **`where`**: This is the condition over which the input is being broadcast. At a given location where this condition is `True`, the resulting array is set to the `ufunc` result. Otherwise, the resulting array retains its original value. This is optioanal.
* **`**kwargs`**: This represents other keyword arguments.

## Return value
This function returns an array of angles in radians. The range of the values is `[-pi, pi]`. 
## Code example

import numpy as np

# creating an array representin the coordinates
x1 = np.array([4, 5])
x2 = np.array([3, 12])

# taking the arctan2 element-wise
myarray = np.arctan2(x1, x2)

print(myarray)

## Explanation 
* **Line 1**: We import the `numpy` module.
* **Line 4–5**: We create arrays, `x1` and `x2`, representing the x and y coordinates, respectively.
* **Line 8**: We implement the `numpy.arctan2()` function on the arrays. The result is assigned to a variable, `myarray`.
* **Line 10**: We print the variable `myarray`.



What is the numpy.arctan2() function in Python?

The numpy.arctan2() function returns the element-wise arc tangent of x1/x2, accounting for the quadrant and outputs angles in radians.