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解题方法
1 . 在直角坐标系xOy中,直线
,圆
,以坐标原点为极点,x轴的正半轴为极轴建立极坐标系.
(1)求C1,C2的极坐标方程;
(2)若直线C3的极坐标方程为
,设C1与C2的交点为O,A,圆C2与C3的交点为O,B,求△OAB的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87237b894e8318e0323b49e83aab5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d61ad2c999e0759e681928106b9012.png)
(1)求C1,C2的极坐标方程;
(2)若直线C3的极坐标方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f849886426afc286746455500e7679.png)
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2019-05-27更新
|
816次组卷
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4卷引用:【市级联考】广东省揭阳市2019届高三高考二模文科数学试题
2 . 在直角坐标系
中,已知直线
:
(
,
),抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
(t为参数).以原点
为极点,
轴的非负半轴为极轴建立极坐标系.
(1)求直线
和抛物线C的极坐标方程;
(2)若直线
和抛物线C相交于点A(异于原点O),过原点作与
垂直的直线
,
和抛物线
相交于点
(异于原点
),求
的面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f47b4dd55cd591081d0c1260125ad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10adc3992efb2badc23f81d36faa206f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e222c14e46e2fcbb8285eeb18e5ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5557fe13c629949f0914f8ef20b4d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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2017-05-12更新
|
648次组卷
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3卷引用:广东省揭阳市2017届高三第二次(4月)模拟考试数学理试题
名校
3 . 已如直线
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.
(Ⅰ)求曲线
的极坐标方程:
(Ⅱ)若直线
(
,
)与曲线
相交于
,
两点,设线段
的中点为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2959ac15d5f3a791f94ab9aa19a0d3fc.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)
(Ⅰ)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc35770ab113e9d9ce8f8fc53c3271e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7cbba6f130b84315180391c177d0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2e40c1f1ff5e667d044767de627fff.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3d833dad7bda8887fdfcaf00bb4c49.png)
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2017-04-06更新
|
1346次组卷
|
6卷引用:2017届广东省揭阳市高三第一次模拟考试数学(理)试卷
2010·广东揭阳·一模
4 . (坐标系与参数方程选做题)设直线
的参数方程为
(
为参数),以坐标原点为极点,x轴为极轴建立极坐标系得另一直线
的方程为
,若直线
与
间的距离为
,则实数
的值为_____________ .
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/bd2f46c54ed14146b539f0469add11f1.png?resizew=8)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/255651b9b48d41db8a97bc6e0ecc7e4b.png?resizew=73)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/20cadcdb61fe4672b4d5f453d946ada2.png?resizew=6)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/569819d1c90043c9987037667c4d1426.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/09e600b3c6284ca1b7bad6d86f37d897.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/bd2f46c54ed14146b539f0469add11f1.png?resizew=8)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1569693363265536/1569693368434688/STEM/569819d1c90043c9987037667c4d1426.png?resizew=9)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2013·广东揭阳·三模
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5 . 在极坐标系中,圆
上的点到直线
的最大距离为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925b34a1e7a48f450d883f9a0197e5c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10825fd2d44ca0195802805c00879849.png)
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