更新1:
想搵F, in terms of 其他未知數
更新2:
係呀,講漏左,係想搵CF
[20分] 數學問題一條
回答 (3)
2008-03-30 5:34 pm
✔ 最佳答案
assume ABCD is a rectangle.let CF intersect with AB at E.
angleBCE is x(triangleBCE is similar to triangleAEF)
CE=a/cosx
EB=a.tanx
AE=b-EB
AE=b-a.tanx
EF=sinx(b-a.tanx)
CF=CE+EF
CF=a/cosx +sinx(b-a.tanx)
2008-03-30 3:45 pm
insufficient of details
2008-03-30 9:22 am
你的問題資料不足,圖中看F是一個點,不知你想搵什麼啊?
收錄日期: 2021-04-29 20:24:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080330000051KK00173