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“三角函数的基本性质”是指现行高级中学三角课本(1958年第二版)第一章“0°到360°的角的三角函数”和第三章“任意角的三角函数”中的主要内容,这是整个三角课的基础部分。现将笔者在教这部分教材时,贯彻少而精原则以提高教学质量的几点粗浅体会写在下面,请同志们指正。就研究的基础而言,三角函数的定义贯串着全都教材;就研究的工具而言,三角函数的线段表示法贯串着全部教材;就研究的对象而言,三角函数的基本性质贯串
The “basic nature of trigonometric functions” refers to the main features of the current “Trigonometric Functions of High School Triangle Textbooks (Second Edition, 1958), Chapter 1 “Angular Functions of Angles 0° to 360°” and Chapter 3 “Trigonometric Functions of Arbitrary Angles”. This is the basic part of the entire triangle course. Now when the author teaches this part of the teaching materials, he has written a few rough ideas on how to improve the teaching quality by implementing the principle of less and more precision. Please ask the comrades to correct me. On the basis of research, the definition of trigonometric functions runs through all teaching materials; in terms of the tools studied, the line segment representation of trigonometric functions runs through all teaching materials; in terms of the objects studied, the basic properties of trigonometric functions are