解题方法
1 . 已知长方体
的体积为
,
,
平面
,若点
到直线
的距离与到直线
的距离相等,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814397354c2ae1cb08e0271305970811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0041488020a3e19377b18a70fbf82e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c2f227b3ec9a65debb32a0395ffd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0a89a3706a6b234c5f217b34f916da.png)
您最近一年使用:0次
2020-02-18更新
|
352次组卷
|
2卷引用:2020届河南省焦作市高三上学期第二次模拟考试数学(理)试题
名校
2 . 已知
是底面边长为1的正四棱柱,
为
与
的交点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ce8661db-5735-4e0b-8871-25a8eb4b9655.png?resizew=172)
(1)设
与底面
所成角的大小为
异面直线
与
所成角的大小为
求证: ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5932db8195eab6c776d37f694aadc84.png)
(2)若点C到平面
的距离为
求正四棱柱
的高;
(3)在(2)的条件下,若平面
内存在点P满足P到线段BC的距离与到线段
的距离相等,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ce8661db-5735-4e0b-8871-25a8eb4b9655.png?resizew=172)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2813b1870eb5c43664820f461a75b402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3544c836718677375096543237755954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5932db8195eab6c776d37f694aadc84.png)
(2)若点C到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39099f98d1a9d10cd0fb6692cb0c13cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(3)在(2)的条件下,若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcab96f97a5e202ba9220bac5280e4f3.png)
您最近一年使用:0次
2019-11-09更新
|
491次组卷
|
4卷引用:第二章 立体几何中的计算 专题二 空间距离 微点1 空间两点间的距离、点到直线的距离【培优版】
(已下线)第二章 立体几何中的计算 专题二 空间距离 微点1 空间两点间的距离、点到直线的距离【培优版】上海市向明中学2018-2019学年高二下学期期中数学试题上海市大同中学2022-2023学年高二上学期期中数学试题(已下线)高二 期中模拟卷(原版卷)