1 . 已知
为等腰直角三角形,
,
,
分别为
和
上的点,且
,
,如图1.沿EF将
折起使平面
平面
,连接
,
,如图2.
![](https://img.xkw.com/dksih/QBM/2021/9/7/2802926553350144/2803656190033920/STEM/6ab3d0d549a04c9bb12d765487232be3.png?resizew=387)
(1)求异面直线
与
所成角的余弦值;
(2)已知
为棱
上一点,试确定
的位置,使
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bd9e8b54864ca44115d24a5aeeb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/9/7/2802926553350144/2803656190033920/STEM/6ab3d0d549a04c9bb12d765487232be3.png?resizew=387)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)已知
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0285afe567ca0b32f0ccafc30167cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
2021-09-08更新
|
729次组卷
|
2卷引用:湖南省长沙市中南博才高级中学等学校联考2022-2023学年高二上学期第一次月考数学试题
解题方法
2 . 如图,在四棱锥P—ABCD中,PD⊥底面ABCD,底面ABCD是边长为1的菱形.
G为PD的中点,E为AG的中点,点F在线段PB上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd38be3024e7e7649d603a2831c2e3.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427922063360/2927407668994048/STEM/4c961fe4-6b5a-4db8-8f5b-33526acff2f3.png?resizew=218)
(1)求证:EF∥平面ABCD;
(2)求GF与平面ABCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f559c75a138ce2e1c710305a644cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd38be3024e7e7649d603a2831c2e3.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427922063360/2927407668994048/STEM/4c961fe4-6b5a-4db8-8f5b-33526acff2f3.png?resizew=218)
(1)求证:EF∥平面ABCD;
(2)求GF与平面ABCD所成角的正弦值.
您最近一年使用:0次
3 . 如图,四棱锥
中,底面
是边长为2的正方形,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936669072900096/2938915202899968/STEM/f92f38925624423e8463721d6aa039d7.png?resizew=260)
(1)若M,N分别为
的中点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
;
(2)求二面角
的正弦值.
![](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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1328e05d150f86dbe18656662eaa8f6b.png)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936669072900096/2938915202899968/STEM/f92f38925624423e8463721d6aa039d7.png?resizew=260)
(1)若M,N分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47891397990336f55f96bd66d367758b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2022-03-18更新
|
454次组卷
|
2卷引用:辽宁省凌源市2022届高三下学期开学抽测考试数学试题
解题方法
4 . 如图,三棱柱
中,
,
,点
,
分别在
和
上,且满足
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989841092280320/2992542634631168/STEM/ab798b79f6214540b426903829ea3e18.png?resizew=179)
(1)证明:
平面
;
(2)若
为
中点,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e17995e2f71e297d94ae51c7e5b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1aa2a175b729cc5caee99e809e40b6.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/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a8673c4f89a0c79f454b1a1e939f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf2496aa984cd7293424dd64506f937.png)
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989841092280320/2992542634631168/STEM/ab798b79f6214540b426903829ea3e18.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaa5e336f830a3e5cd60ff7a756f3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
您最近一年使用:0次
名校
5 . 如图,C,D分别是以AB为直径的半圆O上的点,满足
,△PAB为等边三角形,且与半圆O所成二面角的大小为90°,E为PA的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3a73e84a-27cb-4df4-a354-5424ece967b6.png?resizew=138)
(1)求证:DE//平面PBC;
(2)求二面角A-BE-D的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e925392d0bf25a1a5c698ec1d8adea4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3a73e84a-27cb-4df4-a354-5424ece967b6.png?resizew=138)
(1)求证:DE//平面PBC;
(2)求二面角A-BE-D的余弦值.
您最近一年使用:0次
2022-01-29更新
|
440次组卷
|
3卷引用:江苏省南通市通州区2021-2022学年高三上学期期末数学试题
解题方法
6 . 如图所示,两条异面直线
,
与两平行平面
,
分别交于点
,
和
,
,点
,
分别是
,
的中点,求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/d54dee25-1ada-40f6-a419-96a4ccd3f693.png?resizew=183)
您最近一年使用:0次
名校
解题方法
7 . 如图所示的平行六面体
中,已知
,
,
,
为
上一点,且
,点
棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/2b5a914d-fbf1-499c-8feb-3424a4eec78f.png?resizew=215)
(1)用
,
,
表示
;
(2)若
,求
;
(3)若
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1132330203ed3270a52e0fbd0f34e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13601fc499850fce16debbab6c627ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d76ebfa48fbd7a62488731294de8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28408efa93ec310ccdf156c02fc6c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14184f726fecb76ac6ab3f0b6dfd6f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/2b5a914d-fbf1-499c-8feb-3424a4eec78f.png?resizew=215)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7559d65befe0b85c8929f57c9436cd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd98a891fa65f2fc6688001b03185d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4648d56ec5ba86c288bc22737250ba0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc14c781097654ee29b6b5435c31480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441809d6ce2df21a85b390cdce9b1112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a114d968325e799e60de7ae82d1936.png)
您最近一年使用:0次
解题方法
8 . 已知四棱锥
中,
,侧面
底面ABCD,E,F分别为PC,CD的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/16/2959671514390528/2961385622413312/STEM/efa3dada-c0f9-42b2-a3a8-df8b8ea73568.png?resizew=248)
(1)设点Q为BE上的动点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
平面PAD;
(2)设Q为线段BE上靠近E的一个三等分点,求三棱锥P-BFQ的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9313893592baf9810756098d5ed9cc1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://img.xkw.com/dksih/QBM/2022/4/16/2959671514390528/2961385622413312/STEM/efa3dada-c0f9-42b2-a3a8-df8b8ea73568.png?resizew=248)
(1)设点Q为BE上的动点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(2)设Q为线段BE上靠近E的一个三等分点,求三棱锥P-BFQ的体积.
您最近一年使用:0次
解题方法
9 . 如图,在五面体ABCDEF中,面
是正方形,
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586652106489856/2587378337193984/STEM/e04fac876bd647d5be63e867b2a2cb01.png?resizew=282)
(1)求证:
平面
;
(2)求直线BD与平面ADE所成角的正弦值;
(3)设M是CF的中点,棱
上是否存在点G,使得
平面ADE?若存在,求线段AG的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b31e19fa5cf6d4d5f14f90e87d34ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85caed30a9d505b1e77577915bb2bd38.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586652106489856/2587378337193984/STEM/e04fac876bd647d5be63e867b2a2cb01.png?resizew=282)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求直线BD与平面ADE所成角的正弦值;
(3)设M是CF的中点,棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6287c16246f1c50ea26efc09040333ec.png)
您最近一年使用:0次
2020-11-06更新
|
1030次组卷
|
5卷引用:专题33 空间中线线角、线面角,二面角的求法-学会解题之高三数学万能解题模板【2022版】
(已下线)专题33 空间中线线角、线面角,二面角的求法-学会解题之高三数学万能解题模板【2022版】北京市朝阳区2020届高三年级下学期二模数学试题(已下线)考点31 直线、平面垂直的判定及其性质-备战2021年高考数学(文)一轮复习考点一遍过(已下线)考点32 直线、平面垂直的判定及其性质-备战2021年高考数学(理)一轮复习考点一遍过山东省青岛市青岛第九中学2022-2023学年高一下学期期末数学试题
名校
解题方法
10 . 如图,在三棱锥
中,
平面
,
,
.求证:
;
(2)若
,
分别在棱
,
上,且
,
,问在棱
上是否存在一点
,使得
平面
.若存在,则求出
的值;若不存在.请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c71dbf267939080668be464f1aa60da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)若
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de02d1d5b7ac04bce54be393218922.png)
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2021-08-07更新
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6卷引用:一轮复习大题专练46—立体几何(探索性问题2)-2022届高三数学一轮复习