如图,点P是正方形ABCD外一点,PA⊥平面ABCD,PA=AB=2,且E,F分别是AB,PC的中点.
(1)求证:EF//平面PAD;
(2)求证:EF
平面PCD;
(3)求:直线BD与平面
所成角的正弦.
(1)求证:EF//平面PAD;
(2)求证:EF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(3)求:直线BD与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/d5c39fff-980a-4162-bcf3-6e6e0ea43ebb.png?resizew=184)
11-12高二下·广西百色·阶段练习 查看更多[1]
(已下线)2011-2012学年广西田阳高中高二3月月考数学试卷
更新时间:2016-12-01 18:26:59
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四面体
中,
分别是
的中点,![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/aecf51cb0ff24a209667b5996be7d108.png?resizew=203)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/4b57e338e4b342c3bd3a4d91ca7f730e.png?resizew=144)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/81bcf23aaf4d4ebfae24e5a584c60790.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/08529a3567294ac298595b590fc3c41c.png?resizew=43)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/2fd23893557e445eb99bd77b466b457a.png?resizew=64)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/aecf51cb0ff24a209667b5996be7d108.png?resizew=203)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/4b57e338e4b342c3bd3a4d91ca7f730e.png?resizew=144)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/5f12ce66f7e6435eaf2902ad169ba390.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2018/1/25/1868040089600000/1869535616679936/STEM/c601a74b56174290946561878a458afe.png?resizew=39)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
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解题方法
【推荐2】如图甲所示的正方形
中,
,对角线
分别交
于点
,将正方形
沿
折叠使得
与
重合,构成如图乙所示的三棱柱
.点
在棱
上,且
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c27162b93f88ff58afc18e06db4f80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a0672488ed24f83ea113f4358dced6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f422723c3267cad031751b9413cc6c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebf67d880172b27fefacc3c5b808eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c27162b93f88ff58afc18e06db4f80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebf67d880172b27fefacc3c5b808eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef67f23370e418c1e920699cacd6f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4f1fcdce96fea5c891d85bffa2a625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1de7da3ab92e70f135ea628a691167.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71cd394a420b9b2c76487fe7c9590708.png)
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解答题-问答题
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适中
(0.65)
【推荐3】如图,在四棱锥
中,底面
是直角梯形,
为等边三角形,
分别为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/9b5c34c9-1539-48b5-8b78-ea4cc7001c3f.png?resizew=242)
(1)棱
上是否存在一点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
?若存在,求出
的值;若不存在,说明理由;
(2)若
,当二面角
为
时,证明:直线
与平面
所成角的正弦值小于
.
![](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/aaeab7e7ba38ecddfbeeb235d081ff6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e7f10e0c8af2d0d02a685f6f19e329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/9b5c34c9-1539-48b5-8b78-ea4cc7001c3f.png?resizew=242)
(1)棱
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f457418e6a7e21f0ed0bf490a3709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7b9cd695294892681fe88d2c308ac7c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e70dccdfccce3bb76a145b6d9d5be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479b251fdb01bae6d16abb7f2d694a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,四棱锥
的底面
为菱形,
平面
,
,
,
、
分别为
、
的中点.
(1)求证:
平面
;
(2)求三棱锥
的体积;
(3)求平面
与平面
所成的锐二面角大小的余弦值.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/2010/12/27/1569947759370240/1569947764629504/STEM/acbddd2ad5554786aee8ae95e85a15a5.png?resizew=177)
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适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,底面
为矩形,点E在棱
上,
底面
,
.
,证明:
;
(2)若点D到平面
的距离为
,求
的长.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd51e8f8b1b978b5e2b8084e124fd75c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe308dcc38f31d52a77ee65bb00dd88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)若点D到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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适中
(0.65)
名校
【推荐1】如图,在四棱锥
中,四边形
是菱形,
,
,
,点
是棱
的中点.
;
(2)求平面
与平面
所成角的余弦值.
![](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/32450995497b9e341be832e9efad3114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955e33abb9ac22ea8765272f1926f936.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/8e4125524caac016727c80d2722c5ba3.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
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适中
(0.65)
真题
名校
【推荐2】如图,在直四棱柱
中,已知
,
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004666626048/1573004672851968/STEM/8c1d26c6e56244ea8a70aef45c2b379f.png?resizew=338)
(1)求证:
;
(2)设
是
上一点,试确定
的位置,使
平面
,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8685f5b5ff947449a3123d041ad4f753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d0ca88a83ebe1c4c6d06ce1189ac25.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004666626048/1573004672851968/STEM/8c1d26c6e56244ea8a70aef45c2b379f.png?resizew=338)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27003d5a57fa7a89737aaaffc0afd57e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b1a00e82b03160764dd7109b60f796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】平行四边形
所在的平面与直角梯形
所在的平面垂直,
∥
,
,且
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/f73fb027-67be-4fc6-b323-099df245b5eb.png?resizew=170)
(1)求证:
;
(2)求点
到平面
的距离;
(3)若直线
上存在点
,使得直线
所成角的余弦值为
,求直线
与平面
成角的大小.
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2cd928cc17dec710a5d38928eb9493d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ce8821cc2f3253b9ae9ed7c74b0d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/f73fb027-67be-4fc6-b323-099df245b5eb.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384ffba86ff08ce9e783d5d1bc51686.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255e4b31260bb48247bb50ff55b1418b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64e76a4c1e5934f51cdca2ffbc8313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,在四棱锥
中,
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/4843957b-9858-4465-bcf8-55ad7be977f2.png?resizew=212)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
平面
;
(2)若平面
平面
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63b504a1086dde6360cb40bb9ea32e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddc6faf2ebb390cd7fa7de4d315c810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/4843957b-9858-4465-bcf8-55ad7be977f2.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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