# Atanh()

Today, we will discuss the `atanh()` function in PHP. This function is used to get the inverse hyperbolic tangent of a number.

## What is the atanh() Function?

The `atanh()` function in PHP is a built-in function that is used to get the inverse hyperbolic tangent of a number. The inverse hyperbolic tangent is the value whose hyperbolic tangent is the given number. The function takes a number as input and returns the inverse hyperbolic tangent in radians.

## How to Use the atanh() Function

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

``````<?php
\$number = 0.5;

// Get the inverse hyperbolic tangent of the number using the atanh() function
\$inverse_hyperbolic_tangent = atanh(\$number);

// Output the inverse hyperbolic tangent of the number
echo \$inverse_hyperbolic_tangent;
?>``````

In this example, we set the number as a variable. We then call the `atanh()` function with the number as a parameter to get the inverse hyperbolic tangent of the number. Finally, we output the inverse hyperbolic tangent of the number to the screen.

## Conclusion

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