见人教版高中数学必修(4)1.1.1任意角,例2、例3求出两个集合再求并集计算过程太繁,学生想不到,不容易得出结果。就此介绍一些简单直接易懂的解法与师生共勉。讲完终边相同角的集合后,直接给出下列填空题,要求小组 See People PEP high school math compulsory (4) 1.1.1 Arbitrary angles, Example 2, Example 3 to find two sets and then the collection process is too complicated, the students can not think of, not easy to draw the result. To introduce some simple and straightforward solutions to encourage teachers and students. After completing the same set of the same corner, give the following fill in the blank, ask the group