asin
(PHP 4, PHP 5, PHP 7, PHP 8)
asin — Arc sine
Description
asin(float $num): float
Returns the arc sine of num in radians. asin() is the inverse function of sin(), which means that a==sin(asin(a)) for every value of a that is within asin()'s range.
Parameters
-
num -
The argument to process
Return Values
The arc sine of num in radians
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https://www.php.net/manual/en/function.asin.php
