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解决理解、运算、审题要求较高的题目时,对部分基础知识掌握得不牢固的同学就会形成“陷阱”,能否扫除这些“陷阱”是考察一个同学综合能力强弱的重要因素.下面就三角函数中的“陷阱”来探讨一下:
To solve the problems of high comprehension, calculation and examination, the students who master the part of the basic knowledge will form a “trap”. Whether they can get rid of these “traps” is an important factor to examine the comprehensive ability of a classmate. On the trigonometric function of the “trap” to explore: