如图,已知直三棱柱
,
,
,
,点
为
的中点.
平面
;
(2)求直线
与平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
22-23高二上·北京丰台·期中 查看更多[5]
北京市丰台区2022-2023学年高二上学期期中练习数学(A卷)试题河北省唐山市第二中学2022-2023学年高一下学期期末数学试题(已下线)专题1 立体几何与解三角形(已下线)重难点专题15 空间中的五种距离问题-【帮课堂】(苏教版2019必修第二册)(已下线)第11章:立体几何初步章末重点题型复习(2)-【帮课堂】(人教B版2019必修第四册)
更新时间:2022-11-08 09:38:23
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】如图,在四棱锥
中,底面
是直角梯形,
,
,
底面
,点
为棱
的中点.
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/e056feee-1354-4eb2-a2be-aaf4561595cb.png?resizew=184)
证明:
平面
.
若
为棱
上一点,满足
,求二面角
的余弦值.
![](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/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037afbe66e15832d3ac4ff3694c7c2fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/e056feee-1354-4eb2-a2be-aaf4561595cb.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05c50ea5f6068e3ebc11ec59723d083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f26c2ded122a46dd44b8d8b2740a4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7c507504932bbd38c9d21d31b943a4.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】如图,在平行四边形ABCD中,沿其对角线BD将
折起至
,使得点
在平面ABCD内的射影恰为点B,点E为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/803d83b2-adec-4fa9-9ff6-80b6525ee217.png?resizew=216)
(Ⅰ)求证:
平面BDE;
(Ⅱ)若
,求
与平面BDE所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cea1f4861584aba9b0d551961c8fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/803d83b2-adec-4fa9-9ff6-80b6525ee217.png?resizew=216)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0091fa6d70662a7b3edc5e395c2be253.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900b844294e8c07ea9a858adb845121c.png)
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