Shooting with angle

Ive got the whole gon shooting thing down for a game now all I need it to do is have it shooting at an angle. My shooting script is the basic duplicate movie clip if moviecllip x or y is greater than stage width or stage height delete clip. Thats the basic code I got. Now I need to shoot my bullet at an angle. Like say a missel that goes up and then drops down the height and distance depending on how far you rotate your cannon .