acoshasin
(PHP 4, PHP 5)
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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