asin
asin
(PHP 4, PHP 5, PHP 7)
asin — Arc sine
Description
float asin ( float $arg )
Returns the arc sine of arg
in radians. asin() is the complementary function of sin(), which means that a==sin(asin(a)) for every value of a that is within asin()'s range.
Parameters
-
arg
-
The argument to process
Return Values
The arc sine of arg
in radians
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.asin.php