一般观念指导下的公式教学——以三角函数诱导公式第一课时为例

Formula Teaching Guided by General Concepts—Taking the First Lesson of Trigonometric Induction Formula as an Example

摘要: 本文针对诱导公式教学过程中重结果、碎片化等问题，采取一般观念指导下教学。整个教学彰显了诱导公式整个在三角函数公式学习中的桥梁作用，同时渗透数形结合、对称、坐标变换等思想方法。

Abstract: This article aims to address the issues of heavy results and fragmentation in the teaching process of induction formulas, and adopts a general concept to guide teaching. The entire teaching demonstrates the bridging role of induction formulas in the learning of trigonometric formulas, while incorporating ideas and methods such as numerical and geometric combination, symmetry, and coordinate transformation.