PHP atanh() Function
Definition
The atanh() function returns the inverse hyperbolic tangent of a number.
Syntax
PHP atanh() Function has the following syntax.
atanh(number);Parameter
| Parameter | Is Required | Description |
|---|---|---|
| number | Required. | A number |
Return
| Item | Description |
|---|---|
| Return Value | The hyperbolic tangent of number |
| Return Type | Float |
Example
Return the inverse hyperbolic tangent of different numbers:
<?php//from w w w.j a v a 2s.c o m
echo(atanh(M_PI_4) . "\n");
echo(atanh(0.50) . "\n");
echo(atanh(-0.50) . "\n");
echo(atanh(-1));
?>
The code above generates the following result.
