ActionScript 2.0 Language Reference - Adobe Help and Support

Returns
Number - An integer that is both closest to, and greater than or equal to, parameter x.
Example
The following code returns a value of 13:
Math.ceil(12.5);
See also
floor (Math.floor method), round (Math.round method)
cos (Math.cos method)
public static cos(x:Number) : Number
Computes and returns the cosine of the specified angle in radians. To calculate a radian, see
the description of the Math class entry.
Availability: ActionScript 1.0; Flash Player 5 - In Flash Player 4, the methods and properties
of the Math class are emulated using approximations and might not be as accurate as the nonemulated
math functions that Flash Player 5 supports.
Parameters
x:Number - A number that represents an angle measured in radians.
Returns
Number - A number from -1.0 to 1.0.
Example
The following example displays the cosine for several different angles.
trace (Math.cos(0)); // 0 degree angle. Output: 1
trace (Math.cos(Math.PI/2)); // 90 degree angle. Output: 6.12303176911189e-
17
trace (Math.cos(Math.PI)); // 180 degree angle. Output: -1
trace (Math.cos(Math.PI*2)); // 360 degree angle. Output: 1
Note: The cosine of a 90 degree angle is zero, but because of the inherent inaccuracy of
decimal calculations using binary numbers, Flash Player will report a number extremely close
to, but not exactly equal to, zero.
758 ActionScript classes