float asinh(float $val)
(PHP 4 >= 4.07, PHP 5)
| $val | Value to compute the inverse hyperbolic sine for. |
|---|---|
| RETURNS | Computes the trigonometry function inverse hyperbolic sine for the degree in radians ($val). |
This function computes the inverse hyperbolic sine for the argument $val which is the degree in radians.
Note: This function is not currently available for PHP on Windows.
// compute the inverse hyperbolic sine for 1.4 radians echo 'asinh(1.4) = ' . asinh(1.4);