# Atan2()

Today, we will discuss the `atan2()` function in PHP. This function is used to get the arc tangent of two numbers, which is the angle whose tangent is the quotient of the two numbers.

## What is the atan2() Function?

The `atan2()` function in PHP is a built-in function that is used to get the arc tangent of two numbers. The arc tangent is the angle whose tangent is the quotient of the two numbers. The function takes two numbers as input and returns the arc tangent in radians.

## How to Use the atan2() Function

Using the `atan2()` function in PHP is very simple. Here is an example of how to use the function:

``````<?php
\$y = 1;
\$x = 0.5;

// Get the arc tangent of the two numbers using the atan2() function
\$arc_tangent = atan2(\$y, \$x);

// Output the arc tangent of the two numbers
echo \$arc_tangent;
?>``````

In this example, we set the two numbers as variables. We then call the `atan2()` function with the two numbers as parameters to get the arc tangent of the two numbers. Finally, we output the arc tangent of the two numbers to the screen.

## Conclusion

The `atan2()` function in PHP is a simple and useful tool for any PHP developer working with trigonometry. By using this function, you can get the arc tangent of two numbers, which can be useful in a variety of applications. We hope that this guide has been helpful in understanding how to use the `atan2()` function in your PHP code.