acos
acos
Arc cosine
float **acos** float $num
Returns the arc cosine of in radians.
is the inverse function of
, which means that
for every value of
that is in
the domain of .
num``acos``cos``$num == cos(acos($num))``num``acos
numThe argument to process
The arc cosine of in radians.
num
cos``acosh``asin``atan