acosh

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

acosh — Inverse hyperbolic cosine

Description

acosh(float $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

See Also