1 . 如图,已知在长方体
中,
,
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/2bfda02c-7242-46c4-9ee6-58516584943b.png?resizew=198)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/2bfda02c-7242-46c4-9ee6-58516584943b.png?resizew=198)
A.![]() ![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
2023-01-15更新
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3卷引用:吉林省延边朝鲜族自治州敦化市实验中学校2022-2023学年高二上学期期末数学试题
名校
解题方法
2 . 已知正方体
内切球的表面积为
,P是空间中任意一点:
①若点P在线段
上运动,则始终有
;
②若M是棱
中点,则直线AM与
是异面直线;
③若点P在线段
上运动,三棱锥
体积为定值;
④E为AD中点,过点
,且与平面
平行的正方体的截面面积为
.
以上命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
①若点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763be97fe1e030b5509bda231a546001.png)
②若M是棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
③若点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a80afb14665ad9cb3587c5364980e30.png)
④E为AD中点,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42621cd6793e7f3673fdb49bc3123.png)
以上命题为真命题的是( )
A.① | B.② | C.③ | D.④ |
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3 . 如图,在四棱锥
中,
面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/fd8a65aa-c3e3-45e3-8e60-67ccfc6592c9.png?resizew=188)
(1)求证:
;
(2)求锐二面角
的余弦值;
(3)若
的中点为M,判断直线
与平面
是否相交,如果相交,求出P到交点H的距离,如果不相交,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b42c2055b8da812421b70e74596428.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/fd8a65aa-c3e3-45e3-8e60-67ccfc6592c9.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)求锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a37874cd284fb1a8c864769ce50c9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
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2022-12-31更新
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689次组卷
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2卷引用:吉林省长春市第六中学2022-2023学年高三上学期期末数学试题
4 . 如图,直四棱柱
的底面是菱形,
,E,M,N分别是BC,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/6ae5869f-fcc1-40ad-8bdf-842f67d57d8d.png?resizew=178)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa142bb96af98b846997e681609739f.png)
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
;
(3)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19b6bccaa2a17808d1533aa136c17e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3726450efcb4a70c6ffcb611ab58e9e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/6ae5869f-fcc1-40ad-8bdf-842f67d57d8d.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa142bb96af98b846997e681609739f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a463a03c549b0dba6d90e7f16a2af.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f145b8eaf09812b3abb946ab435eb4.png)
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5 . 如图,在三棱柱
中,平面
平面
,
,四边形
是边长为
的菱形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/81af22e5-9642-4274-bade-53c22ba073ef.png?resizew=165)
(1)证明:
;
(2)若
,求平面
和平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064a04589ae680482d23c3b08f820917.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/81af22e5-9642-4274-bade-53c22ba073ef.png?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba985fb50a9078a839b66bf1d1eadea9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e862713d078c4f06ec1f15ccd6f5a1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b36a70bc52a720ba8750aee4924307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e975f6c9fafab8fd7639dc0cd0f70a4.png)
您最近一年使用:0次
2022-12-11更新
|
499次组卷
|
2卷引用:吉林省长春市实验中学2022-2023学年高二上学期期末数学试题
名校
解题方法
6 . 如图,在四棱锥
中,底面
是正方形,
底面
,E是
的中点,已知
,
.
(1)求证:
;
(2)求证:平面
平面
.
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/28/356c19c8-fee9-4bda-aec5-d35ae9603f07.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304e9d63e7fdc531f4f7b805b765a1b1.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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2023-08-26更新
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14卷引用:吉林省吉林市第四中学2023-2024学年高二上学期9月月考数学试题
吉林省吉林市第四中学2023-2024学年高二上学期9月月考数学试题天津市部分区2020-2021学年高二上学期期中练习数学试题(已下线)专题04 用空间向量研究直线、平面的位置关系 核心素养练习-【新教材精创】2020-2021学年高二数学新教材知识讲学(人教A版选择性必修第一册)(已下线)1.4 (分层练)空间向量的应用-2021-2022学年高二数学考点同步解读与训练(人教A版2019选择性必修第一册)(已下线)第04讲 空间向量的应用(教师版)-【帮课堂】(已下线)第1章 空间向量与立体几何 章末测试(提升)-2021-2022学年高二数学一隅三反系列(人教A版2019选择性必修第一册)湖北省武汉市吴家山中学2021-2022学年高二上学期10月月考数学试题(已下线)高二上学期期中【全真模拟卷01】(人教A版2019)(原卷版)(已下线)高二上学期期中复习【第一章 空间向量与立体几何】九大题型归纳(基础篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)考点巩固卷18 空间向量与立体几何(九大考点)(已下线)模块一 专题1 空间向量与立体几何(人教A)2(已下线)考点10 空间向量的应用 2024届高考数学考点总动员【练】(已下线)模块一 专题2 利用空间向量解决立体几何问题 (讲)1 期末终极研习室(2023-2024学年第一学期)高二人教A版(已下线)专题01 空间向量及其应用常考题型归纳(1)
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7 . 如图,在四棱锥P-ABCD中,平面PAB⊥平面ABCD,底面ABCD为菱形,PA=PB=AB=2,E为AD中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/0d26d46a-b14a-4162-94cc-76e6ebadc26c.png?resizew=174)
(1)证明:AC⊥PE;
(2)若AC=2,F点在线段AD上,当直线PF与平面PCD所成角的正弦值为
,求AF的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/0d26d46a-b14a-4162-94cc-76e6ebadc26c.png?resizew=174)
(1)证明:AC⊥PE;
(2)若AC=2,F点在线段AD上,当直线PF与平面PCD所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
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2022-11-10更新
|
207次组卷
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2卷引用:吉林省长春市第二中学2022-2023学年高二上学期11月月考数学试题
8 . 若将边长为
的正方形ABCD沿对角线BD折成直二面角.
(1)求证AC
BD
(2)求平面ABC与平面BCD的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求证AC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(2)求平面ABC与平面BCD的夹角的余弦值.
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9 . 已知四棱锥
,底面ABCD为菱形,
,H为PC上的点,过AH的平面分别交PB,PD于点M,N,且
平面AMHN.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/7e759ab8-6677-4d09-8c63-b963dc0752cc.png?resizew=237)
(1)证明;
;
(2)若H为PC的中点,
,PA与平面ABCD所成的角为60°,求AD与平面AMHN所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb86d420c825e9dbb9686784f6d4eb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f306ff6d237cd9d847aa109acf9333d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/7e759ab8-6677-4d09-8c63-b963dc0752cc.png?resizew=237)
(1)证明;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11af43b6fbbd2d71f0a30f4a84ce9093.png)
(2)若H为PC的中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83c2fb70ff4c51c80bd6013d8006a17.png)
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2022-10-23更新
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5卷引用:吉林省长春市长春吉大附中实验学校2022-2023学年高二上学期10月月考数学试题
名校
解题方法
10 . 如图.在三棱柱
中,四边形
是边长为
的正方形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/8955a837-6e73-4d18-9cca-4bf5e2bb496f.png?resizew=159)
(1)证明:平面
平面
;
(2)若点M在线段
上且满足
.求直线CM与
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cf3bff56a7f4ab6c0008e90823025d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445cfd832967db6bbaa0a2ea311b4f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551ca28888bdc921c659b9bb8eae1424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e0b10b0e45ee1193ab26836bf1ff0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93edbd735d79524f463085a4e9093bd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/8955a837-6e73-4d18-9cca-4bf5e2bb496f.png?resizew=159)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f841e3f3fd5a2380ff990557fe50570a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d63354d35b9eef8732c993abe89f25e.png)
(2)若点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9756b7c2a9f0cb5a1b025ad4821abdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915f72b23e6d066784713909386d221f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f73038249a611568193c0bcc286fd7.png)
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2022-10-23更新
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3卷引用:吉林省长春市长春吉大附中实验学校2022-2023学年高二上学期10月月考数学试题
吉林省长春市长春吉大附中实验学校2022-2023学年高二上学期10月月考数学试题福建省南安市柳城中学2022-2023学年高二上学期11月期中考试数学试题(已下线)湖南省长沙市长郡中学2024届高三上学期月考(二)数学试题变式题19-22