acosh
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
acosh — Inverse hyperbolic cosine
Description
$num
): float
Returns the inverse hyperbolic cosine of
num
, i.e. the value whose
hyperbolic cosine is num
.
Parameters
-
num
-
The value to process
Return Values
The inverse hyperbolic cosine of num