已知直线l的参数方程
(
为参数),则直线l的普通方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97b8e089314483fc4870ad9221f2605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-07-17 13:42:31
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单选题
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较易
(0.85)
【推荐1】以平面直角坐标系的原点为极点,以
轴的正半轴为极轴,建立极坐标系,则曲线
(
为参数,
)上的点到曲线
的最短距离是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a963c0a19fa16b2415891b075dd04342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2df1bc516cf59796f7610454440afc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea0a763a0f6d9a499affb6dcb3e4d6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5e4719be72e4b53134ffc1364e5eb6.png)
A.0 | B.![]() | C.1 | D.![]() |
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【推荐2】直线
(t为参数)的倾斜角是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9ba424c1539fceabee3a900f2fb901.png)
A.20° | B.70° | C.50° | D.40° |
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解题方法
【推荐1】在平面直角坐标系
中,已知圆
的参数方程为
(
为参数),直线
的参数方程为
(
为参数),则圆
与直线
的公共点有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7d8512a57cefd5165d6c913687432c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8440bf3e26116d2fd3bd8115bebd34d8.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.2 | B.1 | C.0 | D.与参数取值有关 |
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【推荐2】若直线的参数方程为
(t为参数),则直线的斜率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423941a5bfab3ea68b6783ab9c204a9d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次