1.“任意角三角函数”定义教学现状分析近年来,围绕“任意角三角函数”定义教学的热议不绝于耳,概括文[1]、[2]、[3]所反映出来的问题,主要有如下几条:(1)对传统教材中任意角三角函数的“终边定义法”难以割舍,对“单位圆定义法”心理抵触,甚至在概念起始课上,两个定义齐头并举.(2)从锐角三角函数出发,通过“特殊与一般的 1. ”Arbitrary angle trigonometric function “ Analysis of the definition of teaching status In recent years, the hot talk about the definition of teaching about ”Arbitrary angle trigonometric function “ is endless, as summarized in the general papers [1], [2] and [3] The main problems are as follows: (1) It is hard to get rid of ”the definition method of the end edge of any trigonometric function in the traditional textbook “, ”psychological definition of the unit circle “, even in the concept initiation class , Two definitions go hand in hand (2) starting from the acute trigonometric functions, through the ”special and general