FLASH® LITE™ 2.x - Adobe Help and Support

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.
See also
acos (Math.acos method), asin (Math.asin method), atan (Math.atan method),
atan2 (Math.atan2 method), sin (Math.sin method), tan (Math.tan method)
E (Math.E property)
public static E : Number
A mathematical constant for the base of natural logarithms, expressed as e. The approximate
value of eis 2.71828182845905.
Example
This example shows how Math.E is used to compute continuously compounded interest for a
simple case of 100 percent interest over a one-year period.
var principal:Number = 100;
var simpleInterest:Number = 100;
var continuouslyCompoundedInterest:Number = (100 * Math.E) - principal;
trace ("Beginning principal: $" + principal);
trace ("Simple interest after one year: $" + simpleInterest);
trace ("Continuously compounded interest after one year: $" +
continuouslyCompoundedInterest);
//
Output:
Beginning principal: $100
Simple interest after one year: $100
Continuously compounded interest after one year: $171.828182845905
Math 383