三角函数的OFFER（一图展现所有关系）
OFFER (One-Figure-Facilitates-Every-Relationship)for Trigonometric Functions
首次发表
浏览论文内容
中文总结 AI 辅助
介绍用单个图形展示三角函数等内容的OFFER方法及SPORT学习法，方便数学教学，助于有效数学学习。
中文摘要 AI 辅助
本文介绍一种用单个图形说明所有六个三角函数、其基本恒等式及余弦定律的方法，将此方法命名为OFFER以方便数学教学。文章还描述了有效数学学习的SPORT（故事-图片-观察-回顾-讲述）方法。
英文摘要
This article describes an approach that uses a single figure to illustrate all six trigonometric functions, their fundamental identities, and the law of cosines. We name this method OFFER (one-figure-facilitates-every-relationship) for the convenience of mathematics teaching. The article also describes the SPORT (story-picture-observe-review-tell) approach to effective mathematics learning.
