高中数学中有很多问题,表面看似一样,其实本质不同,容易将其混淆导致错误.以下笔者归纳总结高中数学中“形同质异”的知识,并加以对比研究,通过实例辨析来领会它们的区别与联系,供参考.1.带周期的区间与集合例1(1)写出满足sinx>0的区间;(2)求不等式sinx>0的解集; There are many problems in high school mathematics, the surface looks the same, in fact, different in nature, it is easy to be confused and lead to errors.The following author summarizes high school mathematics “metaphorical ” knowledge, and to make comparative studies, through examples of discrimination Understand the difference and connection between them for reference. (1) Write the interval that satisfies sinx> 0; (2) Find the solution set of inequality sinx> 0;