论文部分内容阅读
在处理三角函数中角的范围的判定和函数值的运算这两类问题时,要注意题目中的隐含条件,以免造成错解．如何做呢?有以下建议:
When dealing with the determination of the range of angles in the trigonometric function and the operation of the function value, attention should be paid to the implicit conditions in the title so as not to cause misinterpretation. How to do it? There are the following suggestions: