讲完了《任意角的三角函数》,该讲《同角三角函数的基本关系》了.为什么不让学生自己去推导同角三角函数的基本关系呢?上课了,我“退居二线”,让科代表抄题,主持大局,不准看书.问题1根据任意角的三角函数的定义分别求下列三角函数值,填表1.表1αsinαcosαtanαcotαsecαcscα After finishing the “Triangle Function of Arbitrary Corners”, this lecture talked about “The Basic Relationship of Tongue Trigonometric Functions”. Why did you not allow students to deduce the basic relationship of the same-angle trigonometric function? In class, I “retreated to the second line” and let Section representatives to copy questions, presided over the overall situation, not allowed to read the book. Question 1 according to the definition of the trigonometric function of any angle, respectively, the following trigonometric function values, fill in Table 1. Table 1 αsinαcosαtanαcotαsecαcscα