Math
417
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 Lite 2.0 - In Flash Player 4, the methods and properties
of the Math class are emulated using approximations and might not be as accurate as the non-
emulated 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.
Summary of Contents for Flash Lite 2
Page 1: ...Flash Lite 2 x ActionScript Language Reference...
Page 22: ...22 Contents...
Page 244: ...244 ActionScript language elements...
Page 760: ...760 ActionScript classes...
