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三角函数盤是一个教具,重点应用于高中二年级上学期,这个教具是作者于一九五四年度在上海市五爱中学教授平面三角时设计,由张晓塘同志试制,经过好几次的修改,才达于完善,适合课堂教学的应用。用了这个教具来进行教学,可以把三角函数线的图象,随教材上的需要,又快又正确地表现出来,並且备有与课本上同样的字母标记清楚,不必在黑板上另外作图,从而有充分多余的时间,可作详细的讲解,因此可以减轻了授课的任务。
The trigonometric function disk is a teaching aid, and it is mainly used in the second semester of senior high school. This teaching aid was designed by the author in 1954 when he was teaching the plane triangle at Wu Ai Middle School in Shanghai and was trial-produced by Comrade Zhang Xiaotang, after several modifications. To perfect, suitable for classroom teaching applications. Using this teaching aid for teaching, the image of the trigonometric function line can be displayed quickly and correctly with the needs of the teaching materials, and the same letters as the textbooks are clearly marked. There is no need to additionally plot on the blackboard. Therefore, sufficient time is available for detailed explanation, so the task of teaching can be reduced.