有個3角形 ABC , AB = 8, BC = 10, angle B = 120
find the length of AC, angle C.
有咩方法可以做到E條數?
(唔可以直接 用cosine law!!! 因為我間學校未教)
F.3 trigonometry (easy!!)
2010-05-27 1:33 am
回答 (1)
2010-05-27 4:43 am
✔ 最佳答案
As follows:Link : http://img522.imageshack.us/img522/2222/25052010.gif
圖片參考：http://img522.imageshack.us/img522/2222/25052010.gif
2010-05-26 22:06:38 補充：
or you can find the solution in this link :
http://i678.photobucket.com/albums/vv144/wkho28/25052010.gif
收錄日期: 2021-04-19 22:23:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100526000051KK00850