1 . 在直角坐标系
中,直线
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,曲线
的极坐标方程为
.
(1)求曲线
的普通方程;
(2)已知直线
与曲线
交于
两点,
,求证:
为定值.
![](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/b2181056febdbfcd8929fec1e12d6c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/649b6559771a90c969521378ac66072f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知直线
![](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/b25e326fdf9e5456f48e8a99a069f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5026e1d5fcf2498b2e5ec5da4e0b11b2.png)
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3卷引用:山西省太原市2022届高三上学期期末数学(文)试题
山西省太原市2022届高三上学期期末数学(文)试题山西省太原市2022届高三上学期期末数学(理)试题(已下线)解密23 坐标系与参数方程 (讲义)-【高频考点解密】2022年高考数学(理)二轮复习讲义+分层训练(全国通用)
2 . 在平面直角坐标系xOy中,曲线
的方程为
,点P为曲线
上任意一点,记线段OP的中点Q的轨迹为曲线
,以坐标原点O为极点,x轴正半轴为极轴建立极坐标系.
(1)求曲线
的极坐标方程;
(2)若点M,N分别是曲线
和
上的点,且
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f143ca890a2e92f28a942cbad62781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若点M,N分别是曲线
![](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/d94ef303a6e3c37e71d609cb7a95bfbc.png)
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4卷引用:专题12-1 参数方程与极坐标归类-1
3 . 在平面直角坐标系
中,曲线
的参数方程为
,(其中
是参数,
).以坐标原点为极点,
轴正半轴为极轴,建立极坐标系,曲线
的极坐标方程为
.
(1)证明:曲线
过定点;
(2)若曲线
与曲线
无公共点,求
的取值范围.
![](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/b917e74c4c06f5efd7de75559b697f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb82d86ba75f1ec6304521f2b1353f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ca22561ce6b9d1e217d13d66af3f99.png)
(1)证明:曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若曲线
![](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/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
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7卷引用:青桐鸣2021-2022学年高三3月质量检测理科数学试题
2022高三·全国·专题练习
解题方法
4 . 已知椭圆
,设直线
不经过点
的直线交于
两点,若直线
的斜率之和为
,证明:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896404571561984/2923463462461440/STEM/11c2c5d2-d672-4425-b4fd-729ab3a62033.png?resizew=222)
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6卷引用:解密14 椭圆及其方程(讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)
(已下线)解密14 椭圆及其方程(讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)(已下线)专题41 定比点差法、齐次化、极点极线问题、蝴蝶问题(已下线)专题13 圆锥曲线压轴解答题常考套路归类(精讲精练)-2(已下线)重难点突破18 定比点差法、齐次化、极点极线问题、蝴蝶问题(四大题型)(已下线)专题18 圆锥曲线高频压轴解答题(16大题型)(练习)(已下线)大招17超级韦达定理
5 . 在平面直角坐标系
中,曲线C的参数方程为
(
为参数),以坐标原点O为极点,x轴的正半轴为极轴,取相同长度单位建立极坐标系,直线l的极坐标方程为
.
(1)求曲线C的普通方程和直线l的直角坐标方程;
(2)设直线l与y轴的交点为P,经过点P的动直线m与曲线C交于A,B两点,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87de3ccbef1e3cb0ea5c0e84098f0a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736fc9f625ee6fda2b1b501367427b73.png)
(1)求曲线C的普通方程和直线l的直角坐标方程;
(2)设直线l与y轴的交点为P,经过点P的动直线m与曲线C交于A,B两点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559d66fd8b309fd440ce9bda78a579c9.png)
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4卷引用:四川省广安市2023届高三零诊文科数学试题
四川省广安市2023届高三零诊文科数学试题(已下线)专题12-1 参数方程与极坐标归类-1四川省绵阳南山中学2024届高三下学期高考仿真演练(一)文科数学试题四川省广安市2021-2022学年高二下学期“零诊”考试数学(理)试题
6 . 如图所示,已知半圆O的直径为
,l为位于半圆之外,而又垂直于
延长线的一直线,其垂足为T,且
,又M,N是半圆上的不同的两点,
,
,且
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7acd656195631c58a22b060c0d3ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5903d670301ba4abbfda6324be1a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d9c9b2c01681fab7d312271a860e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bec9ebcbb0a854dfe16b90a7894c9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab14817a0fe0920d012bf0d81ede4f0a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/0658cae7-9fee-442b-a262-8750ef39329d.png?resizew=188)
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2卷引用:高中数学解题兵法 第三十三讲 命题之间的转化与变换
名校
7 . 在平面直角坐标系
中.直线
(t为参数,
为l的倾斜角.
)以坐标原点O为极点,x轴的正半轴为极轴建立极坐标系,圆
,直线l与圆C交于M.N两点.
(1)若直线l的斜率
,求弦MN的中点Q的直角坐标与弦长
的值;
(2)若点
.证明:对任意
,有
为定值.并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d93809af9f575753664939d93d3515e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6b60aec15207d0c144c94f2ec428c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8f06e3cb3d28fba293a21e7c4411e6.png)
(1)若直线l的斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084cf5ffced059f5653ee2a1023518b7.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eab53049ad5fa477be1958e5141629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79188647c574441c2414c3781a0ef543.png)
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2卷引用:湘豫名校2021-2022学年高三下学期4月联考数学(理科)试题
名校
8 . 如图,在直角坐标系中,以原点
为极点,
轴正半轴为极轴建立极坐标系.图中的心型曲线
的极坐标方程为
为曲线
上一动点,曲线
的参数方程为
为参数,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/5bd37748-3b01-4e4d-a829-878f30a531b7.png?resizew=155)
(1)若
与
交于
三点,证明:
为定值;
(2)射线
逆时针旋转
后与
交于点
,求
的最大值.
![](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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe4d6fb3e3916b46c2e544eaaba973d5.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/e6a3099c2c948513459151da0dce79f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b463ed27be664efc447bdc4b4aa936.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/5bd37748-3b01-4e4d-a829-878f30a531b7.png?resizew=155)
(1)若
![](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/5731a7a079c190e18daa159c67765a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5784acc1b6ce159c1193b1581eead14.png)
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4卷引用:陕西省西安中学2022届高三下学期第五次模拟考试理科数学试题
陕西省西安中学2022届高三下学期第五次模拟考试理科数学试题(已下线)押全国卷(理科)第22题 坐标系与参数方程-备战2022年高考数学(理)临考题号押题(全国卷)黑龙江省大庆市大庆中学2022届高三第二次模拟数学(理)试题江西省宜春市上高二中2022届高三5月第十次月考数学(理)试题
名校
9 . 在平面直角坐标系
中,圆C的参数方程为
(
为参数),直线l的参数方程为
(t为参数),设原点O在圆C的内部,直线l与圆C交于M,N两点;以O为极点,x轴的正半轴为极轴建立极坐标系.
(1)求直线l和圆C的极坐标方程,并求a的取值范围;
(2)求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513ab96d9b0704728f0f15c1186a63d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9f6ea18207d6f880b28ae20fbdf832.png)
(1)求直线l和圆C的极坐标方程,并求a的取值范围;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4de13a47637548ce5594ed8d64dec0c.png)
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3卷引用:江西省吉安市2022届高三上学期期末数学(文)试题
10 . 在直角坐标系xOy中,直线
的参数方程为
(
为参数).以坐标原点为极点,
轴的非负半轴为极轴建立极坐标系,圆
的极坐标方程为
.
(1)求
的普通方程和圆
的直角坐标方程.
(2)设
与
的交点为M,N,证明:
是等腰直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214a0bed204bec1fb6e95c3dd171125f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/8389ab08688be6f1bb27bbbb520dc7fb.png)
(1)求
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
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