gistfile1.as

package
{
    import flash.display.Sprite;

    public class Test extends Sprite {
	public function Test(){
	    log(Math.asin(0.5));
	    log(Math.asin(0.5) * 180 / Math.PI);
	    log(Math.acos(0.865));
	    log(Math.acos(0.865) * 180 / Math.PI);
	    log(Math.acos(Math.cos(30 * Math.PI / 180)) * 180 / Math.PI);
	}
    }
}