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解题方法
1 . 某沿海地区的海岸线为一段圆弧
,对应的圆心角
,该地区为打击走私,在海岸线外侧
海里内的海域
对不明船只进行识别查证(如图:其中海域与陆地近似看作在同一平面内),在圆弧的两端点
、
分别建有监测站,
与
之间的直线距离为
海里.
![](https://img.xkw.com/dksih/QBM/2020/2/18/2401669610307584/2401920776536064/STEM/9c394e4da71b4b338e6c234b7701e825.png?resizew=208)
(1)求海域
的面积;
(2)现海上
点处有一艘不明船只,在
点测得其距
点
海里,在
点测得其距
点
海里.判断这艘不明船只是否进入了海域
?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d162c29b1e484cfc87350dd68f00b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://img.xkw.com/dksih/QBM/2020/2/18/2401669610307584/2401920776536064/STEM/9c394e4da71b4b338e6c234b7701e825.png?resizew=208)
(1)求海域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)现海上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe12c9e1cebb9950cb528c875b560a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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2 . 如图,已知定圆
,定直线
过
的一条动直线
与直线
相交于
,与圆
相交于
两点,
是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/3c884cb1-5f9f-403e-ae1e-c7f773ae969b.png?resizew=187)
(1)当
与
垂直时,求证:
过圆心
;
(2)当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c84a09595eabd6ae21a2e8faa7465c.png)
时,求直线
的方程;
(3)设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
,试问
是否为定值,若为定值,请求出
的值;若不为定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85fc19d652ea7c8cd9236a17fc9c306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d2ecbf4eeb997be8293cadc7f71216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc304df70be14cccc9abea2c91e2fdb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd8cb171425253834dfd7fa1a9da9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/3c884cb1-5f9f-403e-ae1e-c7f773ae969b.png?resizew=187)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c84a09595eabd6ae21a2e8faa7465c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdc7bdc6448ef9a13c59fdce1b9bb57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2020-01-06更新
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765次组卷
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5卷引用:江西省宜春市万载中学2019-2020学年高一上学期12月月考数学试题(衔接班)
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3 . 已知点
是圆
上的动点,若
的值是定值,则实数
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8785046420bdd426bbd7a26041ff214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940490622f3b4c85ad31707e7f2e1e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4 . 若圆
的方程为
,△
中,已知
,
,点
为圆
上的动点.
(1)求
中点
的轨迹方程;
(2)求△
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4317565e67fe7caded78002fa0c5052c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26e951d6d2369e8da79a793a93a66a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f3cd3027a533dd07220f161c958602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)求△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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2019-12-02更新
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2卷引用:广东省揭阳市第三中学2019-2020学年高一上学期第二次月考数学试题
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5 . 设有半径为3km的圆形社区,A,B两人同时从社区中心出发,A向东,而B向北直进,A出发后不久,改变前进方向,斜着沿切于社区周界的方向前进,后来恰好与B相遇.若A,B两人的速度都一定,其比为
,则两人在何处相遇?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84783b6ba0f36789519816101a437f46.png)
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2019-10-11更新
|
96次组卷
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5卷引用:吉林省东北师范大学附属中学2019-2020学年度高一上学期数学模块检测试题
吉林省东北师范大学附属中学2019-2020学年度高一上学期数学模块检测试题山东省寿光现代中学2016-2017学年高一下学期第四学段模块监测(期末)数学试题第四章 第二节4.2直线、圆的位置关系江苏省淮安市郑梁梅高级中学2022-2023学年高二上学期第一次月考数学试题(已下线)2.5.2圆与圆的位置关系(基础知识+基本题型)--【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册)
名校
6 . 在平面直角坐标系
中,过点
作圆
的两条切线,切点分别为
、
,且
,则实数
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb8bcde626deb2889c7d3e78d7d06dca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b863e5a5b59210c2fd9a4ced226a7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba1e1ca5040060dde64c667ec432a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f05eb4c4c6f9e6a702735bc0b5122d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a03f089cf43c6c97057978217ad2b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.3 | B.![]() ![]() | C.![]() | D.2 |
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2卷引用:江苏省南通中学2018-2019学年高一5月月考数学试题
7 . 在平面直角坐标系
中,设直线
与圆
交于
两点.圆上存在一点
,满足
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501a6d50c937729c8d0f02b2b62a0ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1410414ebd007a6aebfb75240e2b458f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2d2cd681cebd590839fc4bd2df86e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知点
,点
是圆
上的动点,点
是圆
上的动点,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67bcc9a05b28c4427fa60c4c63b19ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f766a9c61e8c4346ebc3be82f7d59c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e48cb6878d38aebbde8d698cce09376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1f291d5b907508ec673ab2c49ab50f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-07-06更新
|
4999次组卷
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13卷引用:江西省上饶中学2019-2020学年高一上学期12月月考数学(筑梦班)试题
江西省上饶中学2019-2020学年高一上学期12月月考数学(筑梦班)试题江苏省无锡市锡山区天一中学2019年高一期末数学试题湖北省孝感市孝南区孝感高级中学2019-2020学年高二上学期9月月考数学试题江苏省常熟市王淦昌中学2019-2020学年高一下学期开学考试数学试题江苏省苏州市常熟市海虞中学2019-2020学年高一下学期开学考试数学试题黑龙江省哈尔滨市第九中学校2023-2024学年高二上学期10月月考数学试题人教A版(2019) 选择性必修第一册 过关斩将 第二章 直线和圆的方程 2.5 直线与圆、圆与圆的位置关系 2.5.2 圆与圆的位置关系四川省南充市阆中中学2020-2021学年高二(仁智班)上学期期中考试数学(理)试题(已下线)第二章 直线和圆的方程(培优必刷卷)-2021-2022学年高二数学上学期同步课堂单元测试(人教A版2019选择性必修第一册)(已下线)2.2 直线与圆的位置关系(课堂培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)(已下线)课时2.5.2 直线与圆、圆与圆的位置关系(02)圆与圆的位置关系-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)2021年黑龙江省哈尔滨市第三中学校高二上学期期中数学试题(已下线)专题9-2 圆的综合题型归类-2
9 . 如图,某海面上有
、
、
三个小岛(面积大小忽略不计),
岛在
岛的北偏东
方向
处,
岛在
岛的正东方向
处.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/1b789c13-d0c6-4021-a1fe-bdb839f64022.png?resizew=240)
(1)以
为坐标原点,
的正东方向为
轴正方向,
为单位长度,建立平面直角坐标系,写出
、
的坐标,并求
、
两岛之间的距离;
(2)已知在经过
、
、
三个点的圆形区域内有未知暗礁,现有一船在
岛的南偏西
方向距
岛
处,正沿着北偏东
行驶,若不改变方向,试问该船有没有触礁的危险?
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38092ae2fb52cfa5e0017c7eb73381fd.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/9fe602366f921c3c0e58c3f524646be8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/1b789c13-d0c6-4021-a1fe-bdb839f64022.png?resizew=240)
(1)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/c3e4917c34a4c4e654ace35eb65f179b.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)已知在经过
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996bf3d35b6763cbc1a423b13a9df2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba80a2abb9e6a7fd35c5b4c4d20cf779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
您最近一年使用:0次
2019-07-05更新
|
628次组卷
|
2卷引用:江苏省南通中学2018-2019学年高一5月月考数学试题
名校
10 . 如图,已知圆
与
轴的左右交点分别为
,与
轴正半轴的交点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/e901a6a3-a9ed-442f-9448-3e7961713778.png?resizew=173)
(1)若直线
过点
并且与圆
相切,求直线
的方程;
(2)若点
是圆
上第一象限内的点,直线
分别与
轴交于点
,点
是线段
的中点,直线
,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ab11ba6b230c4309e1b899eb58daae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/e901a6a3-a9ed-442f-9448-3e7961713778.png?resizew=173)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3247f03357462fec934f37c65ebdc77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d42cb68c5c877a455ba7ac0a6b6a651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec6297cf195e60fd53375a501deb2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
2019-06-26更新
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971次组卷
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3卷引用:江苏省南通市如东高级中学2019-2020学年高一下学期4月阶段测试数学试题