名校
1 . 如图,在多面体
中,平面
平面
,
平面
和
均为正三角形,
为线段
的中点.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3cfd6b6a7e911d10d1a4bed9ca5e749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46a5ce5c10b7a419055abf43764fce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176385d91d5e29324fce4a932eff6a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9926397d0839f1a02946828dc348a7d.png)
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2023-11-30更新
|
229次组卷
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3卷引用:重庆市永川北山中学校2023-2024学年高二上学期期中考试数学试题
重庆市永川北山中学校2023-2024学年高二上学期期中考试数学试题四川省泸州市泸县第五中学2023-2024学年高二上学期期末数学试题(已下线)湖南省长沙市四县区2024届高三下学期3月调研考试数学试题变式题11-15
名校
解题方法
2 . 如图,矩形
和梯形
,
,
,平面
平面
,且
,
,过
的平面交平面
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/3b76558d-a962-4c56-95ba-e85d81c720d3.png?resizew=116)
(1)求证:
;
(2)当
为
中点时,求点
到平面
的距离;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad6f8846d4294ae3789a6ddd17af5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f36d315245b63a811d5c6f348c17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bebae04c72b934bfbbf0b4d01f164f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a951292add4574c1debd16800674e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/3b76558d-a962-4c56-95ba-e85d81c720d3.png?resizew=116)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710c8b60b12f8003109c1d48cdd91e0f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe38c885f29722c433022c4b2ae6211.png)
您最近一年使用:0次
2022-12-02更新
|
761次组卷
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3卷引用:重庆市永川区永川北山中学校2022年高二上学期期中数学试题
名校
解题方法
3 . 四棱锥
中,底面
为正方形,
平面
,
,E,F分别为PC,AD的中点.
(1)求证:
平面PFB;
(2)求点E到平面PFB的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a148e1cc59be85f85f41cafabeae11f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/286377aa-6e11-4312-b128-08b49802423a.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
(2)求点E到平面PFB的距离.
您最近一年使用:0次
2021-11-09更新
|
258次组卷
|
4卷引用:重庆市永川北山中学校2022-2023学年高二上学期12月月考数学试题
重庆市永川北山中学校2022-2023学年高二上学期12月月考数学试题广东省深圳市人大附中深圳学校2021-2022学年高二上学期期中数学试题(已下线)第04讲 空间向量的应用(4大考点)-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)山东省济宁市实验中学2023-2024学年高二上学期10月月考数学试题
4 . 在长方体
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe38b985695aa1c032fd7b2ef88a8b64.png)
,E,F,P,Q分别为棱![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfd2cfa70c66adb6440ed5f627b12ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc307ea75bec1d37efce66ab8e1e719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff506ec404de582145f1d4c1c65e65dc.png)
的中点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe38b985695aa1c032fd7b2ef88a8b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfd2cfa70c66adb6440ed5f627b12ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc307ea75bec1d37efce66ab8e1e719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff506ec404de582145f1d4c1c65e65dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
A.![]() | B.![]() |
C.![]() | D.直线![]() ![]() ![]() |
您最近一年使用:0次
2020-01-31更新
|
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8卷引用:重庆市永川北山中学校2023-2024学年高二上学期第一次月考数学试题