在数学学习资料中 ,我曾遇到这样一道题 ,“若α为第二象限角 ,则 2α ,α2 分别为第几象限角 ?”解完此题后 ,一股好奇心又驱使我去探讨 α3的变化规律 .运用老师所讲的方法和数形结合的思想 ,我终于将此题弄清楚了 .现将探讨过程介绍如下 .1)当α为第一象限角时 ,则 2ｋπ In mathematics learning materials, I have encountered such a question, “If α is the second quadrant angle, then 2α, α2 are the fourth quadrant angle?” After solving this problem, a curiosity has driven me to explore The law of the variation of α3. Using the methods taught by the teacher and the idea of ​​combining numbers and shapes, I finally figured out this problem. The process will now be discussed as follows. 1) When α is the first quadrant angle, then 2kπ