Easing help

1

Been trying for an hour, cannot figure out how to put any easing into the rotation for the life of me…


            mouseDirection = (Math.atan2(gMouse.y-_y, gMouse.x-_x)/Math.PI*180)+180;
            _rotation=mouseDirection;

//Some attempts:::

            //_x -= _root.rocketSpeed*Math.cos(mouseDirection*Math.PI/180);
            //_y -= _root.rocketSpeed*Math.sin(mouseDirection*Math.PI/180);
            //Radians = _rotation*Math.PI/180;
            //_x += Math.sin(Radians)*5;
            //_y -= Math.cos(Radians)*5;