已知圆C与
轴、
轴、直线
都相切,求圆C的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06eecac8dd7105ca172efe2e88336626.png)
18-19高二上·上海浦东新·阶段练习 查看更多[2]
更新时间:2019-12-09 08:30:16
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真题
【推荐1】抛物线的方程是
,有一个半径为1的圆,圆心在x轴上运动.问这个圆运动到什么位置时,圆与抛物线在交点处的切线互相垂直.
(注:设
是抛物线
上一点,则抛物线在P点处的切线斜率是
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
(注:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dcd8b7991f51184e57f3aa313f9246b.png)
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【推荐2】已知
的边
所在的直线方程分别为
.
(1)求以点A为圆心,与圆
相切的圆的方程;
(2)若
为边
的中点,求边
所在的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47560c94b40bbb8c2b02af7f027079c5.png)
(1)求以点A为圆心,与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f4f8cb6026ec5811a7c00d0877a1a0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708011e87fae90efc444a7477512aac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐3】如图1是一个正方形和一副直角三角板(常用的文具),其中
,将AD与
、BC与
分别重合,并将两个三角板翻起,使点
与点
重合于点M,得到一几何体如图2.
(1)证明:
;
(2)求平面MAD与平面MBC的夹角的余弦值;
(3)在正方形ABCD范围内有以圆心为D、半径为2的一段圆弧,则在该段圆弧上,是否存在点N,使得直线MC与直线DN所成角为
?试说明你的理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2a3e8d764526809572568187f12447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/89e7a5b9-c5c5-44e3-8b41-0259f006d5cd.png?resizew=530)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b33dddf09abfbd05cd35683b2b70ce8.png)
(2)求平面MAD与平面MBC的夹角的余弦值;
(3)在正方形ABCD范围内有以圆心为D、半径为2的一段圆弧,则在该段圆弧上,是否存在点N,使得直线MC与直线DN所成角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
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【推荐1】已知圆C过点
,圆心在x轴正半轴上,且与直线
相切.
求圆C的标准方程;
已知过点
的直线1交圆C于A、B两点,且
,求直线1的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c1bc582e15c8ae375017eff356fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fea239ad769835a277fdd9d0ddd71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6020485d1f9fa00c394c089b879edd97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b0f0fef9c1b70d1d66b07e9af3891f.png)
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【推荐2】已知直线
:
与直线
关于
轴对称.
(1)若直线
与圆
相切于点
,求
的值和
点的坐标;
(2)直线
过抛物线
的焦点,且与抛物线
交于
,
两点, 求
的值 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8d1a34435611f6a59eac3dbfeb6e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1ebebac54adff4bdf08f936f9a63a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/aaff41080fdea43eea7efedf9ebc1498.png)
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