PHP atanh() Function
Example
Return the inverse hyperbolic tangent of different numbers:
<?php
echo(atanh(M_PI_4) . "<br>");
echo(atanh(0.50) . "<br>");
echo(atanh(-0.50) . "<br>");
echo(atanh(1) . "<br>");
echo(atanh(-1));
?>
Run example »
Definition and Usage
The atanh() function returns the inverse hyperbolic tangent of a number.
Syntax
atanh(number);
| Parameter | Description |
|---|---|
| number | Required. Specifies a number |
Technical Details
| Return Value: | The hyperbolic tangent of number |
|---|---|
| Return Type: | Float |
| PHP Version: | 4.1+ |
| PHP Changelog: | PHP 5.3: This function is now available on all platforms |
PHP Math Reference
