In a plate glass factory, sheets of glass move along a conveyor belt at a speed of 15.0 cm/s. An automatic cutting tool descends at preset intervals to cut the glass to size. Since the assembly belt must keep moving at constant speed, the cutter is set to cut at an angle to compensate for the motion of the glass. The glass is 72.0 cm wide and the cutter moves from one edge to the other in 3.0 s. The cutter should be set to move at what angle to the width of the sheet?