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《三角函数的诱导公式(一)》是王克亮老师于2016年11月24日在盐城高中数学基础年级教学研讨会上开设的公开课,发表在《中学数学教学参考》2017年第3期上旬。本节课是苏教版《数学4》(必修)第一章第二节的内容。王老师的设计改变了教材中公式的呈现方式,凸显了圆的对称性与诱导公式之间的关系,设计了一堂有“味”的课,给人以耳目一新的感觉,可谓是“一场思维的饕餮盛宴”。笔者结合自身学习,谈谈对本堂课的一些感想和思考。
“Trigonometric Function Induction Formula (a)” is an open class by Professor Wang Keliang on November 24, 2016 at Yancheng High School Mathematics Grades Teaching Seminar. It is published in “2017 High School Mathematics Teaching Reference” No. 3 early. This lesson is the content of the second chapter of chapter one of the Sujiao version of “Mathematics 4” (compulsory). Wang’s design changed the presentation of the formula in the textbook, highlighted the relationship between the symmetry of the circle and the induction formula, and designed a lesson with “taste” to give a fresh feeling, which is “ A gluttonous feast of thinking ”. I combine their own learning, talk about some of the feelings and thinking of this lesson.