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2把复数引入三角函数的研究这一部分和前一部分不同.前一部分讲到的三角函数知识是完全成熟了的,绝大多数教师是很熟悉的,按本文的讲法给学生上课是可以的.这一部分涉及微积分,进入中学教材时间还短,许多教师还不太熟悉,需要进一步消化.特别是围绕欧拉公式的内容,如何教给学生,
2 The introduction of trigonometric functions to complex numbers This part differs from the previous one: the knowledge of trigonometric functions mentioned in the previous section is completely mature, and most teachers are familiar with it, so it is possible for students to attend classes according to this article. Some involve calculus, and the time to enter secondary school teaching materials is still short, and many teachers are not yet familiar with it and need to be further digested. In particular, how to teach students about the Euler formula,