sin11Xsin4X+sin5Xsin2X=0. If 0<=X<=360
答案是怎樣知道有多少個?
收錄日期: 2021-04-24 10:16:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130701000051KK00093