在矩形ABCD中,
,
,沿BD折叠后C点在平面ABD上的射影M恰好落在AD上,如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/43cdb398-e5d0-45a7-9afd-ef200e06c1c8.png?resizew=155)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
(2)求CD与平面ABD所成角的余弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/43cdb398-e5d0-45a7-9afd-ef200e06c1c8.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
(2)求CD与平面ABD所成角的余弦值
21-22高一下·上海闵行·期末 查看更多[2]
上海市上海师范大学附属中学闵行分校2021-2022学年高一下学期期末数学试题(已下线)第10章 空间直线与平面(A卷·知识通关练)-【单元测试】2022-2023学年高二数学分层训练AB卷(沪教版2020必修第三册)
更新时间:2022-06-28 13:25:54
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在长方体
中,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/2019/7/9/2243055820095488/2243093447163904/STEM/20bca9dd1ca54579ae1c2672b40a46c7.png?resizew=190)
(1)求证:直线
平面
;
(2)求证:平面
平面
;
(3)求直线
与平面
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90916ae433c09c065f9f05309612413a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2019/7/9/2243055820095488/2243093447163904/STEM/20bca9dd1ca54579ae1c2672b40a46c7.png?resizew=190)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923d409630f5331cf8e85fb6c584e31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24006d28116bc097933cc90bcc0ea69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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适中
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【推荐2】如图,四边形
为梯形,
,
,
,
,
,点
在
上,且
.现沿
将
折起至
的位置,使
.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958751621644288/2962082452348928/STEM/4d626cfe-ca26-4782-8af8-27c64e3dbbba.png?resizew=343)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953f11eb95bfc036d85b472f81c6fb4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b6d3947d1ac5a2942ae58183acedf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e340674361f3742dd118ccc82d23c741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16dbbc3b3b87c64f4570b068749228b1.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958751621644288/2962082452348928/STEM/4d626cfe-ca26-4782-8af8-27c64e3dbbba.png?resizew=343)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604a7e1e37d514c1dd84b07d85e7cbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642401af2d7fc2de640ff7f6a8715950.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐3】如图,在多面体ABCDEF中,已知正方形ABCD和矩形BDEF,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/7a51055c-84c7-4706-8337-f98c43084f6b.png?resizew=177)
(1)求证:
平面ABCD;
(2)求直线AE与平面CEF所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b5ccccb7804bf760f26b44c2ce1021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1150e7caf86393601b45976f94f3e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/7a51055c-84c7-4706-8337-f98c43084f6b.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
(2)求直线AE与平面CEF所成角的正弦值.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在三棱锥
中,
和
都是以
为斜边的等腰直角三角形.
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/d3c8efd1ddce4c1d813b052772a2a05c.png)
(1)求证:
;
(2)若
,求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/eb560c2c8a3e4bd4a06baa28991e5cee.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/1286025a37e14bada8cab6572721fd59.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/7b3af87e59a74b388f3540ddb0f0c32d.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/98a1217f7bde47cb8924b776820384ff.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/d3c8efd1ddce4c1d813b052772a2a05c.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/9c60f93647384981a623f77db12196cf.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/1de01de9bb194581aafe3686249710b5.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573094781263872/1573094787194880/STEM/eb560c2c8a3e4bd4a06baa28991e5cee.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,底面
为菱形,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6e2aa1ca-77e6-404b-8f76-e7f54ee18009.png?resizew=162)
(1)证明:
;
(2)若
为
中点,则在线段
上是否存在点
,使得
平面
?若存在,求
的值;若不存在,请说明理由.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6e2aa1ca-77e6-404b-8f76-e7f54ee18009.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa0fe5da877bd3d3e406957d58a2679.png)
您最近一年使用:0次