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1 . 已知曲线C的极坐标方程为
,A,B是曲线C上不同的两点,且
,其中O为极点.
(1)求曲线C的直角坐标方程;
(2)求点B的极径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293bcfd0679b28bea188755ae9c10d9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f375e6d640ae99446982f05221810ce3.png)
(1)求曲线C的直角坐标方程;
(2)求点B的极径.
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2023-04-23更新
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441次组卷
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4卷引用:四川省成都市第七中学2022-2023学年高二下学期期中考试数学(理)试题
2 . 在极坐标系
中,已知曲线
与
相交于O,A两点.
(1)求
;
(2)将直线OA绕点O顺时针旋转
角,与
交于点O,B,将直线OA绕点O逆时针旋转
角,与
交于点O,C,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c7c3be7c3c822b41e6a482f175705b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28564fb3c5854f15b460feb217259c0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c388f1f7160d3397610633dfde015fa0.png)
(2)将直线OA绕点O顺时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202f0eb155d3b5eecff55509e342896f.png)
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2022-07-03更新
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327次组卷
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3卷引用:河南省开封市2021-2022学年高二下学期期末数学文科试题
3 . (1)求以
为圆心,半径等于2的圆的极坐标方程;
(2)从极点O作圆C的弦ON,求ON的中点M的轨迹方程.
(3)曲线:
与曲线C和点M的轨迹方程分别交于A,B两点,求|AB|.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134fc3507b06c25a6cdf06b7ae11f055.png)
(2)从极点O作圆C的弦ON,求ON的中点M的轨迹方程.
(3)曲线:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
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解题方法
4 . 在极坐标系中,已知曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39c04c99014cff2b47a7fa878b2b649.png)
(1)若
,曲线
与极轴所在直线交于
两点,且
,求
的值;
(2)若
,直线
经过极点且相互垂直,
与
交于
两点,
与
交于
两点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39c04c99014cff2b47a7fa878b2b649.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.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/7ce395dfb7eab4d1d58a19bce2bfdaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](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/f6bce3d91ca23b86d8c6625f2632e437.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6951e550edf6a8a3c0d30c35178d7f.png)
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2021-05-17更新
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1317次组卷
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10卷引用:全国1卷地区联考“顶尖计划”2021届高三第三次考试文科数学试题
全国1卷地区联考“顶尖计划”2021届高三第三次考试文科数学试题河南省“顶尖计划”2021届高三第三次考试理科数学试题全国1卷地区联考“顶尖计划”2021届高三毕业班第三次考试理科数学试题河南省“顶尖计划”2021届高三第三次考试文科数学试题江西省新余市第一中学2021届高三全真模拟考试数学(理)试题皖豫名校联盟体2021届高三4月第三次考试数学(理)试题黑龙江省哈尔滨市第六中学2021-2022学年高三上学期第一次月考数学(理)试题吉林省吉林市桦甸市第四中学2021-2022学年高三上学期10月月考数学(理)试题河南省焦作市温县第一高级中学2021-2022学年高三上学期10月月考数学(理)试题河南省鹤壁高中2021-2022学年高三上学期一轮复习质量检测(二)数学(文)试题
5 . 如图是以等边三角形
的每个顶点为圆心,以边长为半径,在另两个顶点间作一段弧,三段弧围城的曲边三角形,记为勒洛
(勒洛三角形是德国机械工程专家,机构运动学家勒洛首先发现的,故命名为勒洛三角形).在平面直角坐标系
中,以坐标原点O为极点,以x为轴正半轴为极轴建立极坐标系,(规定:极径
,极角
),已知点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/e70268de-beca-4f44-8f5b-1a2c749a3963.png?resizew=193)
(1)求
和
的极坐标方程;
(2)已知点
,Q是
上的动点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278949a1dbbe742ef4dfb4596fd94911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c190373ee81d43a2f12f2482e8977680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f299452d466df7bc11c761c3d2d037f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/e70268de-beca-4f44-8f5b-1a2c749a3963.png?resizew=193)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f606bf7959544f92f299b27053041e85.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7500f8e5d957a762f4738fcb6e1af18d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f077fb4f73c2123538e19365d84748.png)
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