名校
解题方法
1 . 1.如图,在底面为直角梯形的四棱锥
中,
,
,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/0cd4d610-74ae-469f-8cd8-bdef6855f467.png?resizew=268)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/0cd4d610-74ae-469f-8cd8-bdef6855f467.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
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2021-12-04更新
|
325次组卷
|
3卷引用:黑龙江省绥化市第一中学2021-2022学年高二上学期期中数学试题
名校
2 . 如图,在正方体
中,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8990fc94-b3d8-47ef-9b50-ec62bce0f4c4.png?resizew=169)
(1)求证:
;
(2)求直线
和
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8990fc94-b3d8-47ef-9b50-ec62bce0f4c4.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abfb167a3ba72cd72db2579b6ecddc1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
您最近一年使用:0次
2021-12-04更新
|
626次组卷
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3卷引用:天津市部分区2021-2022学年高二上学期期中练习数学试题
3 . 已知直三棱柱
,
,
,
,
分别为
,
,
的中点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4bf0cd5d0f1cd6dee1eee88d34e0ad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/a2389888-ef82-4d12-9a79-2114b5f1d24d.png?resizew=132)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af2626608f61a4cfbb86494bd6df0e2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4bf0cd5d0f1cd6dee1eee88d34e0ad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/a2389888-ef82-4d12-9a79-2114b5f1d24d.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757ef0bdb7fbd0e05acf10023b011527.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,在正方体
中,
为
的中点,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898435970957312/2921487903449088/STEM/d27f0ada-4c20-4c51-896e-7b356c98dff8.png?resizew=189)
(1)若
,证明:
与平面
不垂直;
(2)若
平面
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898435970957312/2921487903449088/STEM/d27f0ada-4c20-4c51-896e-7b356c98dff8.png?resizew=189)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370cfaff07758cdfb11aa0dfbacdc041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6e90b3c6db0b9696640fb1940c4a8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1513526394db145397593dab4e327820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9f048e7abf7bb18ef3f39cdf148aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2022-02-22更新
|
555次组卷
|
4卷引用:福建省厦门市2021-2022学年高二上学期期末质量检测数学试题
名校
5 . 如图,在棱长为2的正方体
中,E,F分别为AB,BC上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897947545264128/2901930963943424/STEM/e8fee7e2-6c17-41c2-87ee-cace542b2460.png?resizew=175)
(1)求证:
;
(2)当
时,求点A到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836e7d93ea31aac11dff8c02972a2ef3.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897947545264128/2901930963943424/STEM/e8fee7e2-6c17-41c2-87ee-cace542b2460.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03022e8d9e2d2f962c6baa39463c6714.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
您最近一年使用:0次
2022-01-25更新
|
572次组卷
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3卷引用:广东省东莞市2021-2022学年高二上学期期末数学试题
解题方法
6 . 在正棱锥
中,三条侧棱两两互相垂直,
是
的重心,
,
分别是
,
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/f082bcac-e6c8-4ca8-b965-a96ef43445b8.png?resizew=141)
求证:(1)平面
平面
;
(2)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44f904c75c4210348a96e743b43a91e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/f082bcac-e6c8-4ca8-b965-a96ef43445b8.png?resizew=141)
求证:(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc3fec8696dfed93bb1ea269e0ac947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c651a0ecf22c2ad68fb6719adb949e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,四棱锥S-ABCD的底面是正方形,每条侧棱的长都是底面边长的
倍,P为侧棱SD上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b29c2ba0-858c-481b-aae7-9bf229142e29.png?resizew=150)
(1)求证:AC⊥SD;
(2)若SD⊥平面PAC,求平面PAC与平面ACD的夹角大小;
(3)在(2)的条件下,侧棱SC上是否存在一点E,使得BE∥平面PAC.若存在,求SE∶EC的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b29c2ba0-858c-481b-aae7-9bf229142e29.png?resizew=150)
(1)求证:AC⊥SD;
(2)若SD⊥平面PAC,求平面PAC与平面ACD的夹角大小;
(3)在(2)的条件下,侧棱SC上是否存在一点E,使得BE∥平面PAC.若存在,求SE∶EC的值;若不存在,试说明理由.
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2021-10-17更新
|
529次组卷
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8卷引用:广东省深圳市宝安第一外国语学校2021-2022学年高二上学期10月数学试题
18-19高二·全国·假期作业
名校
解题方法
8 . 已知正方体ABCD-A1B1C1D1中,E为棱CC1上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5a51bf53-a8c0-440b-ad07-7e5b1afef448.png?resizew=211)
(1)求证:A1E⊥BD;
(2)若平面A1BD⊥平面EBD,试确定E点的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5a51bf53-a8c0-440b-ad07-7e5b1afef448.png?resizew=211)
(1)求证:A1E⊥BD;
(2)若平面A1BD⊥平面EBD,试确定E点的位置.
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2021-10-14更新
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1157次组卷
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10卷引用:步步高高二数学寒假作业:作业16空间向量与平行、垂直关系
(已下线)步步高高二数学寒假作业:作业16空间向量与平行、垂直关系(已下线)第九课时 课后 1.4.1.3 空间中直线、平面的垂直(已下线)1.4.1 第2课时 空间向量与垂直关系(分层练习)-2021-2022学年高二数学教材配套学案+课件+练习(人教A版2019选择性必修第一册)山东省青岛第十九中学2021-2022学年高二上学期10月月考数学试题(已下线)专题36 空间向量在立体几何中的应用-学会解题之高三数学万能解题模板【2022版】2023版 北师大版(2019) 选修第一册 突围者 第三章 第四节 课时2 用向量方法讨论立体几何中的位置关系(已下线)第09讲 立体几何与空间向量 章节总结 (讲)-1(已下线)第4讲 空间向量的应用 (1)(已下线)第07讲 空间向量的应用 (1)上海市宝安区2023-2024学年高二上学期调研测试数学试题
名校
解题方法
9 . 如图,在正方体ABCD-A1B1C1D1中,点E,F分别为棱DD1、BB1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1c50aa02-91c5-4d7a-84fa-0b76f841ce06.png?resizew=175)
(1)证明:直线CF//平面
;
(2)若该正方体的棱长为4,试问:底面ABCD上是否存在一点P,使得PD1⊥平面A1EC1,若存在,求出线段DP的长度,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1c50aa02-91c5-4d7a-84fa-0b76f841ce06.png?resizew=175)
(1)证明:直线CF//平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fd7d2bc169d4467ad7d70861ed6351.png)
(2)若该正方体的棱长为4,试问:底面ABCD上是否存在一点P,使得PD1⊥平面A1EC1,若存在,求出线段DP的长度,若不存在,请说明理由.
您最近一年使用:0次
2021-12-11更新
|
656次组卷
|
3卷引用:江苏省镇江市丹阳市2021-2022学年高二上学期期中数学试题
江苏省镇江市丹阳市2021-2022学年高二上学期期中数学试题江西省赣州市赣县第三中学2021-2022学年高二12月月考数学(理)试题(已下线)第06讲 向量法求空间角(含探索性问题) (高频考点—精练)
解题方法
10 . 在直三棱柱
中,
,
,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/cce87a9d-f108-460c-a662-3a9cf95fbe3a.png?resizew=160)
(1)证明:
;
(2)求直线
与平面
所成的角;
(3)求点
到平面
的距离.
![](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/6f8e9ec412ea0355e4e5cd06c60e5fee.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/cce87a9d-f108-460c-a662-3a9cf95fbe3a.png?resizew=160)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5022df1a374a23fc4be39f5d1cf3c87d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
您最近一年使用:0次
2021-11-11更新
|
281次组卷
|
2卷引用:北京市丰台区2021-2022学年高二上学期数学期中练习试题(B卷)