1 . 若动点
、
分别在直线
和
上移动,则
的中点
到原点距离的最小值为( )
![](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/ed2fbaa796e7796f89d7145357a44988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef46e5d31552aaadc4cf98429d0edfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-09-25更新
|
1132次组卷
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8卷引用:上海市七宝中学2021届高三上学期摸底数学试题
上海市七宝中学2021届高三上学期摸底数学试题(已下线)考点32 两直线的位置关系、直线的交点坐标与距离公式-备战2021年新高考数学一轮复习考点一遍过上海市洋泾中学2023届高三上学期开学考试数学试题(已下线)热点07 解析几何-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)第二章 章末检测-2020-2021学年高二数学同步课堂帮帮帮(人教A版2019选择性必修第一册)(已下线)考向25 直线与方程-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)专题18 直线和圆的方程(练习)-2(已下线)第07讲 直线的交点坐标与距离公式-【同步题型讲义】2022-2023学年高二数学同步教学题型讲义(人教A版2019选择性必修第一册)
2 . 已知圆
,圆
过
作圆
的切线,切点为
(
在第二象限).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/ab1136fa-e8d3-476f-8a0a-fbbaa0a58eac.png?resizew=165)
(1)求
的正弦值;
(2)已知点
,过
点分别作两圆切线,若切线长相等,求
关系;
(3)是否存在定点
,使过点
有无数对相互垂直的直线
满足
,且它们分别被圆
、圆
所截得的弦长相等?若存在,求出所有的点
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bccf8bdcfbf3f0daa2e2b5492e29e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/ab1136fa-e8d3-476f-8a0a-fbbaa0a58eac.png?resizew=165)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe66d45f07f3ce0954009ed11302e26.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(3)是否存在定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e0db273061d0331e4e5da9ff1e955e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2020-04-25更新
|
1629次组卷
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2卷引用:江苏省苏州大学附属中学2020-2021学年高二上学期期初数学试题