已知平面直角坐标系xOy中,曲线C的参数方程为
,(
为参数),以原点为极点,x轴的正半轴为极轴建立极坐标系,直线l的极坐标方程为
.
(1)求曲线C的极坐标方程以及直线l的直角坐标方程;
(2)若直线
与直线l交于M,与曲线C交于O,N,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5e1a55579ca43d6fb75a93ad2237d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa1d4eaacf033e80662f3fedd759a12.png)
(1)求曲线C的极坐标方程以及直线l的直角坐标方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5442d805aaa02c31327455d702fd08ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878a0f760f9d39c11ae061d68022efa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
更新时间:2020-02-01 12:41:32
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】选修4-4:坐标系与参数方程
在平面直角坐标系中,以坐标原点为极点,
轴正半轴为极轴建立极坐标系,圆
的极坐标方程为
,直线
的参数方程为
为参数,
为常数).
(1)求直线
的普通方程和圆
的直角坐标方程;
(2)若直线
分圆
所得的两弧长度之比为
,求实数
的值.
在平面直角坐标系中,以坐标原点为极点,
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/fb8833eb2a174729b2c10acb98325554.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/90747217569e4a94b67e3926b804e014.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/931291d3c9bb4f81bfec59b79f989486.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/73a32e192e43473395e4c25ad584b4dd.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/9fd50a042e30450781eabd9ec11e3fad.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/33565c8d318841e785c838f6e8c95e11.png)
(1)求直线
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/73a32e192e43473395e4c25ad584b4dd.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/90747217569e4a94b67e3926b804e014.png)
(2)若直线
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/73a32e192e43473395e4c25ad584b4dd.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/90747217569e4a94b67e3926b804e014.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/91f71a11e1764e318f9264e8b0fc247d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549892096/STEM/33565c8d318841e785c838f6e8c95e11.png)
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名校
【推荐2】已知直线l:
,曲线C:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ad004146bd890d74838aa53898b882.png)
(1)当m=3时,判断直线l与曲线C的位置关系;
(2)若曲线C上存在到直线l的距离等于
的点,求实数m的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8080c71d6faf08e46d5f312585ac5906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ad004146bd890d74838aa53898b882.png)
(1)当m=3时,判断直线l与曲线C的位置关系;
(2)若曲线C上存在到直线l的距离等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
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解题方法
【推荐1】在直角坐标系xoy中,已知曲线C:
(
为参数),以坐标原点为极点,x轴的非负半轴为极轴建立极坐标系,
(1)求曲线C的极坐标方程,若A,B为曲线C上的两点,证明当
时,
定值;
(2)若过点
且倾斜角为
的直线l与曲线C相交于A,B两点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42673589bf80ca9e57f7bbaddef73189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(1)求曲线C的极坐标方程,若A,B为曲线C上的两点,证明当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73768f715441a10788cc3d576a309a15.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2dd9c531b52396586588da83ed881c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2d50a03130b0d6036f8354b81b7243.png)
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【推荐2】在直角坐标系中,已知曲线
的参数方程为
(
为参数),以原点为极点,
轴的非负半轴为极轴建立极坐标系,射线
的极坐标方程为
,射线
的极坐标方程为
.
(Ⅰ)写出曲线
的极坐标方程,并指出是何种曲线;
(Ⅱ)若射线
与曲线
交于
两点,射线
与曲线
交于
两点,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fae550ab9522743761d4b02eb3cce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4b7de5a31afa2ce5bf3f0ef26e9df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faecf3060855c0d20ce487ae71893e26.png)
(Ⅰ)写出曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce335408a2a7459f46f1c140c5fe20a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b2e6a596589a074a2cb60d95617152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6765a87bcc2b6d44aabdee9af73e6cd2.png)
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【推荐1】以平面直角坐标系的原点为极点,
轴的正半轴为极轴,建立极坐标系,两种坐标系中取相同的长度单位,直线
的参数方程是
(
是参数),曲线
的极坐标方程为
.
(1)写出直线
的普通方程和曲线
的直角坐标方程;
(2)设点
的直角坐标为
,直线
与曲线
的交点为
,
,试求
及
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb1ba888910df69ab605d97764efc.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/3090f402c832733acd781e0406ec19e1.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)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559d66fd8b309fd440ce9bda78a579c9.png)
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解答题-问答题
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适中
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【推荐2】选修4-4:坐标系与参数方程
已知曲线
的参数方程为
(
为参数),以坐标原点
为极点,以
轴的正半轴为极轴建立极坐标系,已知直线
的极坐标方程为
,
.
(1)若直线
与曲线
交于不同的两点A,
,当
时,求
的值;
(2)当
时,求曲线
关于直线
对称的曲线方程.
已知曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d98249846d88b46fbe92fcb3794c2a0c.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ec501696478e97604a578bfdeb1046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd046435916341a04edc3e73344ebc8a.png)
(1)若直线
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ba5383e768dc86e1bfd79c10f96f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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