Find the equations of the tangents to the circle C:x^2+y^2+2y-4=0 with
y-intercept 4. (hints : there are two tangents)
F.5 Maths(Equation of Circle)
2011-02-20 9:25 am
回答 (1)
2011-02-20 9:43 am
✔ 最佳答案
As follows:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/ScreenHunter_08Feb200141.gif
收錄日期: 2021-04-22 00:52:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110220000051KK00123