1 . 如图所示,在四棱锥
中,
平面
,底面ABCD满足AD∥BC,
,
,E为AD的中点,AC与BE的交点为O.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/32985d4d-445f-41d1-83a9-6bc6e625cd24.png?resizew=153)
(1)设H是线段BE上的动点,证明:三棱锥
的体积是定值;
(2)求四棱锥
的体积;
(3)求直线BC与平面PBD所成角的余弦值.
![](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/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a992115be2c1874282898fea4417ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/32985d4d-445f-41d1-83a9-6bc6e625cd24.png?resizew=153)
(1)设H是线段BE上的动点,证明:三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63360ee144c8caaed4aea74e2058cc12.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(3)求直线BC与平面PBD所成角的余弦值.
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2022-07-16更新
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930次组卷
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2卷引用:陕西省西安市长安区第一中学2021-2022学年高一下学期期末数学试题
名校
2 . 在三棱锥P−ABC中,AB=BC,BC⊥平面PAB,平面PAC⊥平面ABC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/832db05e-64c8-439f-a97b-63a7229a16cc.png?resizew=149)
(1)证明:PA⊥平面ABC;
(2)若D为PC的中点,且
,求平面DAB与平面ABC所成二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/832db05e-64c8-439f-a97b-63a7229a16cc.png?resizew=149)
(1)证明:PA⊥平面ABC;
(2)若D为PC的中点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d827c3694aaa02490e0a9c01b45ddc5.png)
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2022-07-16更新
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2卷引用:湖南师范大学附属中学2021-2022学年高一下学期期末数学试题
解题方法
3 . 如图,已知四棱锥
的底面为矩形,
,
,顶点
在底面
的正投影为
的中点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f4a08f6c-8ad3-4fa8-9673-da8c86003b65.png?resizew=179)
(1)求证:平面
平面
;
(2)若平面
与平面
的交线为
,且
,求
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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f4a08f6c-8ad3-4fa8-9673-da8c86003b65.png?resizew=179)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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解题方法
4 . 如图,正四棱柱
中,M为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d024c5a8-b2fc-47bf-a0d1-879f653b9cf1.png?resizew=148)
(1)若点N满足
,求证:M、B、
、N四点共面;
(2)若
,求直线CD平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d024c5a8-b2fc-47bf-a0d1-879f653b9cf1.png?resizew=148)
(1)若点N满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a36eb94b79db6916c9aa98843efd4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2f706801662432b68797e72647c6e.png)
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解题方法
5 . 如图1,菱形ABCD中∠ABC=120°,动点E,F在边AD,AB上(不含端点),且存在实数
使
,沿EF将△AEF向上折起得到△PEF,使得平面PEF⊥平面BCDEF,如图2所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/fc808256-a8c2-4605-94da-7d42da3a24a5.png?resizew=364)
(1)若BF⊥PD,设三棱锥P-BCD和四棱锥P-BDEF的体积分别为
,
,求
;
(2)当点E的位置变化时,平面EPF与平面BPF的夹角(锐角)的余弦值是否为定值,若是,求出该余弦值,若不是,说明理由;
(3)若AB=2,求四棱锥P-BDEF的外接球半径的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceeb60f40e8d5b6fc184be29ce3d4bd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/fc808256-a8c2-4605-94da-7d42da3a24a5.png?resizew=364)
(1)若BF⊥PD,设三棱锥P-BCD和四棱锥P-BDEF的体积分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f737b04ce09bc7e1ed86dc9b3c85203b.png)
(2)当点E的位置变化时,平面EPF与平面BPF的夹角(锐角)的余弦值是否为定值,若是,求出该余弦值,若不是,说明理由;
(3)若AB=2,求四棱锥P-BDEF的外接球半径的最小值.
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解题方法
6 . 如图,圆台的轴截面ABCD为等腰梯形,
,E为弧AB的中点,F为母线BC的中点,则异面直线AC和EF所成角的正切值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/ce319bff-efab-4d29-811c-80d9387f2770.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a0680ad91a91b1669c58436edee993.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/ce319bff-efab-4d29-811c-80d9387f2770.png?resizew=157)
A.![]() | B.![]() | C.![]() | D.2 |
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2022-07-14更新
|
1088次组卷
|
5卷引用:山东省济宁市2021-2022学年高一下学期期末数学试题
解题方法
7 . 如图,在四棱锥P—ABCD中,底面ABCD是边长为2的正方形,E为侧棱PC的中点,若平面ABE与棱PD的交点为F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/f2fb1d08-824f-45f6-a158-6250f212403c.png?resizew=174)
(1)求证:F为侧棱PD的中点;
(2)若PA⊥平面ABCD,且CF与平面PAD所成角的正切值为
,求二面角P—BE—A的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/f2fb1d08-824f-45f6-a158-6250f212403c.png?resizew=174)
(1)求证:F为侧棱PD的中点;
(2)若PA⊥平面ABCD,且CF与平面PAD所成角的正切值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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2022-07-14更新
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2卷引用:山东省济宁市2021-2022学年高一下学期期末数学试题
名校
8 . 四棱锥
中,四边形
为菱形,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/1529d48c-dbc9-4bb9-95bb-4161869432ae.png?resizew=218)
(1)证明:
;
(2)若
,且PA与平面ABCD成角为60°,在棱PC上是否存在点E,使二面角
的平面角的余弦值为
?若存在,求出PE的长;若不存在,说明理由.
![](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/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/1529d48c-dbc9-4bb9-95bb-4161869432ae.png?resizew=218)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6f1d672d4d7775a81ccf0464a8d742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954795d1842974a705f9468f3b952ab1.png)
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2022-07-13更新
|
1004次组卷
|
2卷引用:重庆市南开中学校2021-2022学年高一下学期期末数学试题
名校
解题方法
9 . 已知E、F、G、H分别是正方体
,边AB,CD,
,
的中点,则异面直线EH与GF所成角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://img.xkw.com/dksih/QBM/2022/7/11/3020364841852928/3021134148329472/STEM/0bf2372e3a4046c7a67d99b57e25d02b.png?resizew=139)
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2022-07-12更新
|
1980次组卷
|
8卷引用:山东省德州市2021-2022学年高一下学期期末数学试题
山东省德州市2021-2022学年高一下学期期末数学试题(已下线)突破1.4 空间向量的应用(重难点突破)(已下线)第09讲 立体几何与空间向量 章节总结 (讲)-1广东省湛江市第四中学2022-2023学年高二上学期第一次月考数学试题安徽省淮南市第五中学2022-2023学年高二上学期第一次月考数学试题山东省济南市莱芜区济南市莱芜第一中学2022-2023学年高一下学期6月月考数学试题贵州省黔东南州2022-2023学年高一下学期期末文化水平测试数学试题福建省宁德第一中学2022-2023学年高二下学期3月月考数学试题
解题方法
10 . 如图,菱形ABCD边长为2,∠BAD=60°,E为边AB的中点,将△ADE沿DE折起,使A到
,连接
,
,且
,平面
与平面
的交线为l,则下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/7/11/3020364841852928/3021134148001792/STEM/ad1691681e6c49a5874cb3012444e458.png?resizew=247)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42212c86d4b95260e285a4cb605b1c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b12cffc313a181f666e3fc8e66b6f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1530d93834fbafba5f7217778ea90442.png)
![](https://img.xkw.com/dksih/QBM/2022/7/11/3020364841852928/3021134148001792/STEM/ad1691681e6c49a5874cb3012444e458.png?resizew=247)
A.平面![]() ![]() | B.![]() |
C.ВС与平面![]() ![]() | D.二面角![]() ![]() |
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2022-07-12更新
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1659次组卷
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7卷引用:山东省德州市2021-2022学年高一下学期期末数学试题
山东省德州市2021-2022学年高一下学期期末数学试题(已下线)专题1.12 空间向量与立体几何全章综合测试卷-基础篇-2022-2023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)山东省临沂市第二十四中学2022-2023学年高一下学期6月月考数学试题浙江省杭州市六县九校2022-2023学年高二上学期期中数学试题(已下线)7.3 空间角(精练)第一章 空间向量与立体几何(B卷·能力提升练)-【单元测试】2022-2023学年高二数学分层训练AB卷(人教A版2019)(已下线)1.2.4 二面角(分层训练)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第一册)