APPARATUS FOR LEARNING TRIGONOMETRIC FUNCTION

摘要

PURPOSE: The trigonometrical function learner by intuition can study the trigonometrical function. CONSTITUTION: The width person(10) indicates the scale. The vertical ruler(20) is fixed and coupled the width person and vertically. The scale which from side to side mobiles, is included according to the width person is sculptured. It is possible to rotate, the connector(30) couples one end in the width person with the hinge.