1 . 在平面直角坐标系中,以坐标原点为极点,
轴的非负半轴为极轴建立极坐标系,若曲线
的极坐标方程为:
.
(1)求曲线
的直角坐标方程;
(2)已知
,过点
作直线
交曲线
于
两点,证明:
为定值.
![](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/f63d6fce5efef48a4e31134cd89179f9.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248909c543977b1a7490bc01fcf44d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c552f7bc957eed6b29e76b1b556d2e9.png)
您最近一年使用:0次
2020-09-22更新
|
207次组卷
|
4卷引用:江西九江市第一中学2019—2020学年度高二下学期期末考试数学(理科)试题
解题方法
2 . 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)
您最近一年使用:0次
3 . 在平面直角坐标系
中,直线
的参数方程为
(
为参数),以坐标原点
为极点,
轴正半轴为极轴建立极坐标系,曲线
的极坐标方程为
.
(Ⅰ)求直线
的普通方程和曲线
的直角坐标方程;
(Ⅱ)若点
的极坐标为
,直线
与曲线
相交于
,
两点,求证:
.
![](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/7da6199b3cca2e49aaabace363c0ed7b.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/7f34ad37ee24b2a380d2310c54316067.png)
(Ⅰ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a174d698f45032865f769adb821bc1.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13fe4e032aae6845be171920a6c56ec.png)
您最近一年使用:0次
2020-07-29更新
|
209次组卷
|
3卷引用:宁夏石嘴山市第三中学2021届高三上学期期末考试数学(理)试题
名校
4 . 数学中有许多形状优美,寓意美好的曲线,曲线
就是其中之一(如图).
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525783041941504/2527117615276032/STEM/a89d9799630b40cdb38b31661568666f.png?resizew=128)
(1)以O为极点,x轴的正半轴为极轴建立极坐标系,求曲线C的极坐标方程;
(2)求证:曲线C上任意一点到原点的距离都不超过4.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616c14c6c7f8e58d7e5d9a528f812894.png)
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525783041941504/2527117615276032/STEM/a89d9799630b40cdb38b31661568666f.png?resizew=128)
(1)以O为极点,x轴的正半轴为极轴建立极坐标系,求曲线C的极坐标方程;
(2)求证:曲线C上任意一点到原点的距离都不超过4.
您最近一年使用:0次
2020-08-13更新
|
476次组卷
|
4卷引用:四川省成都市石室中学2022届高三上学期期末数学(理)试题
名校
5 . 在直角坐标系
中,已知曲线
:
,将曲线
经过伸缩变换
得到曲线
;以直角坐标系原点为极点,
轴的正半轴为极轴建立极坐标系.
(1)写出曲线
的极坐标方程;
(2)若
,
分别是曲线
上的两点,且
,求证:
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/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157add92bfbc75a208d95ea10a35cf5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)写出曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若
![](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/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcb4841ae7bb1d5f91837094cdfcf2c.png)
您最近一年使用:0次
2020-04-06更新
|
400次组卷
|
2卷引用:安徽省六安市舒城中学2019-2020学年高二下学期期末文科数学试题
6 . 已知椭圆
,
是原点,
,
是椭圆上两点,
,以
为极点,
轴正半轴为极轴建立极坐标系,取相同的长度单位.
(1)利用极坐标证明
是定值;
(2)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)利用极坐标证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcb4841ae7bb1d5f91837094cdfcf2c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
2020-09-03更新
|
170次组卷
|
2卷引用:内蒙古土默特左旗第一中学2019-2020学年高二下学期期末考试数学(理)试题
名校
解题方法
7 . 已知椭圆
(
为参数),A,B是C上的动点,且满足
(O为坐标原点),以原点O为极点,x轴的正半轴为极轴建立坐标系,点D的极坐标为
.
(1)求椭圆C的极坐标方程和点D的直角坐标;
(2)利用椭圆C的极坐标方程证明
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5298133eba992d1ca83f038681652e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3deb2f685fff5b6053b490fab6924e21.png)
(1)求椭圆C的极坐标方程和点D的直角坐标;
(2)利用椭圆C的极坐标方程证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcb4841ae7bb1d5f91837094cdfcf2c.png)
您最近一年使用:0次
8 . 在直角坐标系
中,已知曲线
(
为参数
),其中
.在以
为极点,
轴的正半轴为极轴的极坐标系中,已知曲线
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8f484bd0144dc12c15cd4a832219f8.png)
(1)求
与
的交点
的直角坐标;
(2)求证:交点
至少有一点在曲线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fc6a3cb8bb9c7624228a71f8495925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10adc3992efb2badc23f81d36faa206f.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/c28564fb3c5854f15b460feb217259c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8f484bd0144dc12c15cd4a832219f8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(2)求证:交点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
您最近一年使用:0次
名校
9 . 在平面直角坐标系xOy中,已知曲线E经过点P
,其参数方程
(
为参数),以原点O为极点,x轴的正半轴为极轴建立极坐标系.
(1)求曲线E的极坐标方程;
(2)若直线
交E于点A,B,且OA
OB,求证:
为定值,并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de261e9b4defbc0be6440397031a87b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafbcbe6e195fd37a474e0b0038037a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)求曲线E的极坐标方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb8956ebcde7cf0f1011a2fc1888e15.png)
您最近一年使用:0次
2019-12-27更新
|
928次组卷
|
7卷引用:广东省广州市流溪中学2020届高三上学期期末数学(文)试题
名校
10 . 已知曲线
的极坐标方程为
,倾斜角为
的直线
过点
.
(1)求曲线
的直角坐标方程和直线
的参数方程;
(2)设
是过点
且关于直线
对称的两条直线,
与
交于
两点,
与
交于
两点.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b01da27c299e595731d6d57cf4ace0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5946cdc295468832011cb95bf233c7f5.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50297ad9f7256b4d2efc3462289f18b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8bc5614c9fb23adc6482b7a728817da.png)
您最近一年使用:0次
2019-03-20更新
|
622次组卷
|
7卷引用:【全国百强校】江西省南昌市第二中学2018-2019学年高二上学期期末考试数学(文)试题