论文部分内容阅读
为了加强概念教学,提高效果,注意以下几点是有益的。 1.理清脉络以反正弦函数为例,它是建立在正弦函数和反函数的基础上的。讲反正弦函数时,已与讲反函数的概念、正弦函数的概念相隔很长一段时间了,因此首先要复习这一内容,然后对正弦函数适当选取自变量的取值范围,使它到值域的对应是一一映射,从而引出正弦函数的反函数,建立反正弦函数。只有理清了这个脉络,才可以使学生得到清晰的概念。
In order to strengthen the concept of teaching and improve the effect, it is useful to note the following points. 1. To clarify the context Take the inverse sine function as an example. It is based on the sine function and the inverse function. When speaking about the inverse sine function, it has been separated from the concept of inverse function and the concept of sine function for a long time. Therefore, we must first review this content, and then select the range of values of the independent variable appropriately for the sine function to make it The corresponding value range is a one-to-one mapping, which leads to the inverse function of the sine function and establishes the inverse sine function. Only by clarifying this context can students get a clear idea.