find the eqs. of tangent from the origin to the circle x^2+y^2-4x-2y+4=0.
ans: y=0 or 4x-3y=0
coordinate geometry(circle)
2010-04-04 6:44 am
回答 (1)
2010-04-04 6:56 am
收錄日期: 2021-04-23 20:47:31
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https://hk.answers.yahoo.com/question/index?qid=20100403000051KK01728