acosacosh
(PHP 4 >= 4.1.0, PHP 5)
acosh — Inverse hyperbolic cosine
Description
float acosh
( float $arg
)
Returns the inverse hyperbolic cosine of arg, i.e. the value whose hyperbolic cosine is arg.
Parameters
- arg
-
The value to process
Return Values
The inverse hyperbolic cosine of arg
Changelog
| Version | Description |
|---|---|
| 5.3.0 | This function is now available on all platforms |
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