过原点作圆
(
为参数)的两条切线,则这两条切线所成的锐角为_________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde1f282dc5c1154170d85b4b8e11e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
更新时间:2022-02-22 11:02:22
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【推荐1】过点
引
的两条切线,切点分别是
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______ .
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【推荐2】已知圆
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,若
为直线
:
上的点,过点
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【推荐1】直线
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【推荐2】若直线
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