在极坐标系中,
,
,
,以极点O为原点,极轴为x轴的正半轴,建立平面直角坐标系,已知直线l的参数方程为
(t为参数,
),且点P的直角坐标为
.
(1)求经过O,A,B三点的圆C的极坐标方程;
(2)求证直线l与(1)中的圆C有两个交点M,N,并求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1a9821a00b71f6b7d7a76d91b3f810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f2fee11cd80e25b6f319c34eccc4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c36e2bbd82360f0411080435c8b4b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1108bdbdc840746ab6c3428e82f6144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa528bcfeca58c46fedfeaf0969d3a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.png)
(1)求经过O,A,B三点的圆C的极坐标方程;
(2)求证直线l与(1)中的圆C有两个交点M,N,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79188647c574441c2414c3781a0ef543.png)
2023·陕西西安·二模 查看更多[2]
更新时间:2023-05-02 15:33:00
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】平面直角坐标系
中,直线
的参数方程为
(
为参数),以
为极点,
轴的非负半轴为极轴建立极坐标系,曲线
的极坐标方程是
.
(1)写出直线
的普通方程与曲线
的参数方程;
(2)设
为曲线
上任意一点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dc92ad29632d82296f8e2216c48039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6a35b8f665a797390a23df8cf9c985.png)
(1)写出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57cd01ad1f1422f2f04b4ea33d35a308.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在直角坐标系
中,曲线
的方程为
(
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.
(1)点
为
上任意一点,若
的中点
的轨迹为曲线
,求
的极坐标方程;
(2)若点
,
分别是曲线
和
上的点,且
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbcf6f85690daf16ec3928834bc1f3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0b06dc01c30d13f64be2ac6a1d811e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ba4cf66ad78c53705e97578eec1645.png)
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解答题-问答题
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适中
(0.65)
【推荐3】已知直线
的参数方程为
(
为参数).在以坐标原点
为极点,
轴的正半轴为极轴的极坐标系中,曲线
的极坐标方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ab03581e7191c8195570d6d57b504e.png)
(1)求直线
的普通方程和曲线
的直角坐标方程;
(2)设直线
与曲线
交于
两点,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e3b18675d0844f346ad2721571d3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ab03581e7191c8195570d6d57b504e.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff24c95fe581befd56c3bcc70e88b726.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】在平面直角坐标系xOy中,直线l的参数方程为
(t为参数).以坐标原点O为极点,x轴的正半轴为极轴建立极坐标系,曲线C的极坐标方程为
.
(1)写出直线l的普通方程和曲线C的直角坐标方程:
(2)在平面直角坐标系xOy中,设直线l与曲线C相交于A,B两点,若点
恰为线段AB的一个三等分点,求正数m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0093a17234eee18eaaf33fb6fb02d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51aeb70c8e4fe84d617002f8ca5b478.png)
(1)写出直线l的普通方程和曲线C的直角坐标方程:
(2)在平面直角坐标系xOy中,设直线l与曲线C相交于A,B两点,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a42451bdbef6c82dbaf8e06f0614794.png)
您最近一年使用:0次
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(0.65)
名校
【推荐2】以直角坐标系xOy的原点为极坐标系的极点,x轴的正半轴为极轴.已知曲线C1的极坐标方程为ρ=4cosθ+8sinθ,P是C1上一动点,
,Q的轨迹为C2.
(1)求曲线C2的极坐标方程,并化为直角坐标方程;
(2)若点M(0,1),直线l的参数方程为
(t为参数),直线l与曲线C2的交点为A,B,当|MA|+|MB|取最小值时,求直线l的普通方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c6ef0316d6344650c4327e0d5792c8.png)
(1)求曲线C2的极坐标方程,并化为直角坐标方程;
(2)若点M(0,1),直线l的参数方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5190bf0e02221ce471caa2f31998877.png)
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