已知圆O:x2+y2=1,圆
过O1作圆O的切线,切点为T(T在第二象限).
![](https://img.xkw.com/dksih/QBM/2021/4/5/2693512392810496/2693857590059008/STEM/233a726a-730b-4d26-ba5b-90a845e62a6a.png?resizew=248)
(1)求∠OO1T的正弦值;
(2)已知点P(a,b),过P点分别作两圆切线,若切线长相等,求a,b关系;
(3)是否存在定点M(m,n),使过点M有无数对相互垂直的直线l1,l2满足l1⊥l2,且它们分别被圆O、圆O1所截得的弦长相等?若存在,求出所有的点M;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251a3b6bdb4491117246d08dfb529fe8.png)
![](https://img.xkw.com/dksih/QBM/2021/4/5/2693512392810496/2693857590059008/STEM/233a726a-730b-4d26-ba5b-90a845e62a6a.png?resizew=248)
(1)求∠OO1T的正弦值;
(2)已知点P(a,b),过P点分别作两圆切线,若切线长相等,求a,b关系;
(3)是否存在定点M(m,n),使过点M有无数对相互垂直的直线l1,l2满足l1⊥l2,且它们分别被圆O、圆O1所截得的弦长相等?若存在,求出所有的点M;若不存在,请说明理由.
2021高三·江苏·专题练习 查看更多[2]
更新时间:2021-04-06 10:10:12
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【推荐1】古希腊数学家阿波罗尼斯发现如下结论:“平面内到两个定点
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