asin() function returns the arc sine of a number between -1 and 1.
asin() function takes only one parameter,
number, a number between -1 and 1 of type
float. The function returns the arc sine of the
number in radians as a
number is outside of the range of -1 to 1, the function returns
NAN (not a number).
The codebyte example below uses the
asin() function to return the arc sine of