在极坐标系中,与圆
相切的一条直线的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cf89e94eb51129f144d9809ec290f7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2017-03-18 22:21:23
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【推荐1】若曲线
上有
个点到曲线
的距离等于
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2057eea69f30c8e526f04602fe314c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc70ced651ba8ef8814959be4e1c83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】已知曲线
的极坐标方程为:
,
为曲线
上的动点,
为极点,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8936de0d585b78a8eda44553071e296b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f625aa2ab29879c1df77417e9c1cf71.png)
A.2 | B.4 | C.![]() | D.![]() |
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【推荐1】已知点
的极坐标是
,则过点
且垂直于极轴的直线方程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f2f0cb3762991d3e6f2b3453db0cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知椭圆的极坐标方程是
,那么它的短轴长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4db5090a500f5c512b3cbe9ac736886.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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