(PHP 4 >= 4.1.0, PHP 5, PHP 7)
asinh — Inverse hyperbolic sine
asinh ( float $arg ) : float
Returns the inverse hyperbolic sine of arg
, i.e. the value whose hyperbolic sine is arg
.
arg
The argument to process
The inverse hyperbolic sine of arg
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https://www.php.net/manual/en/function.asinh.php