1 . 如图,已知正方形
与矩形
所在的平面互相垂直,
,
,
分别为
,
的中点.
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bebae04c72b934bfbbf0b4d01f164f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/75d74511-6814-4722-9fe7-de00d8913c92.png?resizew=181)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5a01b5afcb0e7c3ccf2f00ef4a93df.png)
您最近一年使用:0次
名校
2 . 如图,AP是圆柱的母线,正△ABC是该圆柱的下底面的内接三角形,D,E,F分别为BC,PB,AB的中点,G是EF的中点,且AP=AC.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854639979487232/2858441973432320/STEM/c4c74883-a062-4fd1-9673-0b9c6354a888.png)
(1)求证:DG
平面PAC;
(2)求直线DG与平面PBC所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854639979487232/2858441973432320/STEM/c4c74883-a062-4fd1-9673-0b9c6354a888.png)
(1)求证:DG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)求直线DG与平面PBC所成角的正弦值.
您最近一年使用:0次
2021-11-24更新
|
276次组卷
|
3卷引用:山东省潍坊市昌邑市潍坊实验中学2023-2024学年高二上学期数学期中模拟卷(一)
名校
3 . 如图,菱
与四边形
相交于
,
平面
,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/e305e394-a7a8-442c-a496-e1f00cc0805b.png?resizew=242)
(1)求证:
平面
;
(2)求直线
与平面
成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53164bb576ae54daff37bec4b2eacd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c919e775030a0d72da748ff579d023b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327832ffb5a937d88a1069395a8552af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/e305e394-a7a8-442c-a496-e1f00cc0805b.png?resizew=242)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb889644ad10bffc2319e1f02640003b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2017-06-02更新
|
767次组卷
|
5卷引用:山东省日照市2017届高三第三次模拟考试数学理试题
名校
解题方法
4 . 在正方体
中,点
为棱
的中点.问:在棱
上是否存在点
,使得
∥面
?若存在,请说明点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee16c91119c5601a7c93a6642c95e7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e363082228a653eb5b0dbc3c6161a9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/a306da02-e2c9-4d6c-9e41-fad9691298df.png?resizew=160)
您最近一年使用:0次
解题方法
5 . 在如图所示的空间几何体中,
,四边形
为矩形,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/94b70457-2bed-4173-bea2-2b86b2f4ad61.png?resizew=190)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec346cba41b378fcd97f1607835e259a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/94b70457-2bed-4173-bea2-2b86b2f4ad61.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade8233bc5e455bc00825e081647519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2016-12-04更新
|
699次组卷
|
2卷引用:2016届山东省济宁市高三下学期3月模拟考试文数试卷
解题方法
6 . 如图,在四棱锥
中,
平面
,
,
,点
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572961857257472/1572961863262208/STEM/c55d8b5d-6732-4164-bdcb-387be7fa8fc7.png?resizew=242)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef7ba7bd94c55dc1a5c056fea0368a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9ba90b720518d70eb4d365b2afaeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3251ed69ae80ade98e499e3e648a81af.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572961857257472/1572961863262208/STEM/c55d8b5d-6732-4164-bdcb-387be7fa8fc7.png?resizew=242)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac48b9ac8efbf41d6ab5242d247bd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次