2sinAcosA=sin2A,點解﹖

2007-06-23 9:45 pm
點樣證明﹖

回答 (1)

2007-06-23 9:49 pm
✔ 最佳答案
RHS
=sin2A
=sin(A+A)
=sinAcosA+sinAcosA
=2sinAcosA
=LHS
參考: i'm a F.4 student


收錄日期: 2021-04-19 01:43:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070623000051KK01862

檢視 Wayback Machine 備份