Clancy is tightening a bolt, but does not want to over-torque it, and damage the device. He knows that torque depends on force, lever arm, and angle. He exerts a force of 20 N on a lever arm of 0.2 m, at an angle of 90. If he reduces either the force or lever arm by 50%, the torque will also reduce by 50%. Why will reducing the angle by 50% not reduce the torque in a similar way?