asin
(PHP 4, PHP 5, PHP 7, PHP 8)
asin — Arc sine
Description
Returns the arc sine of num in radians.
asin() is the inverse function of
sin(), which means that
$num == sin(asin($num)) for every value of
num that is in
the domain of asin().
Parameters
num-
The argument to process
Return Values
The arc sine of num in radians
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