(坐标系与参数方程选做题)已知直线
的方程是
(
为参数),以坐标原点为极点,
轴的正半轴为极轴建立极坐标系,圆
的极坐标方程为
,则圆
上的点到直线
的距离的最小值是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ef2d80d35da6ee059567fa3ef92d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da02db31d3c74f50e0b44d9f105fe97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
更新时间:2016-12-03 09:37:50
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【知识点】 曲线的参数方程
相似题推荐
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真题
【推荐1】已知曲线
的参数方程为
(
为参数),
在点
处的切线为
,以坐标原点为极点,
轴的正半轴为极轴建立极坐标系,则
的极坐标方程为_____________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd80647a1eb857f2cc38238d5d4cfd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d09499542f54aa2221c2a8ad3ba9ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
【推荐2】直线
(
为参数)与圆
有两个交点
,
,若点
的坐标为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb48f8f26a0dde8f62984ec36712ef4.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8800d81274fa24c54eb6f0a72e4f86c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8833ba3833480237f47774984958c01d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb48f8f26a0dde8f62984ec36712ef4.png)
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