名校
1 . E、F是正方体
的棱DC上两点,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
A.直线![]() ![]() |
B.平面![]() ![]() ![]() |
C.平面![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
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名校
解题方法
2 . 如图,
为直角梯形,
.连
,将
沿
翻折成三棱锥
,当三棱锥
外接球表面积的最小值时,二面角
的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/099e7bef-991a-43de-ab2e-818da2db7139.png?resizew=249)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e441d43cf4c47d9ae024f987b75d8728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/099e7bef-991a-43de-ab2e-818da2db7139.png?resizew=249)
A.![]() | B.0 | C.![]() | D.![]() |
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2023-05-12更新
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1068次组卷
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4卷引用:浙江省绍兴市上虞区2023届高三第二次适应性考试(二模)数学试题
浙江省绍兴市上虞区2023届高三第二次适应性考试(二模)数学试题广东省东莞实验中学2023届高三高考热身数学试题(已下线)专题14 立体几何小题综合(已下线)第二章 立体几何中的计算 专题六 几何体的外接球、棱切球、内切球 微点14 多边形折叠成模型综合训练【基础版】
3 . 已知三棱锥
中,△
是边长为3的正三角形,
与平面
所成角的余弦值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/9ddcd617-0a02-4ed3-bbb8-061a42205fe5.png?resizew=160)
(1)求证:
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b3ff0a1b2125d3864027aaf8ae7577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/9ddcd617-0a02-4ed3-bbb8-061a42205fe5.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
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2023-05-09更新
|
1334次组卷
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6卷引用:浙江省温州市普通高中2023届高三下学期3月第二次适应性考试数学试题
浙江省温州市普通高中2023届高三下学期3月第二次适应性考试数学试题(已下线)专题05 立体几何(已下线)专题14 押全国卷(理科)第18题 立体几何(已下线)专题10 空间角、距离的计算-期中期末考点大串讲(苏教版2019必修第二册)江苏省淮安市楚州中学、新马中学2022-2023学年高二下学期期中联考数学试题(已下线)专题03 立体几何大题
名校
解题方法
4 . 如图,平面四边形ABCD中,
,
为正三角形,以AC为折痕将
折起,使D点达到P点位置,且二面角
的余弦值为
,当三棱锥
的体积取得最大值,且最大值为
时,三棱锥
外接球的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/d930e5ed-e24d-4b6e-8f3c-0426d3389d94.png?resizew=268)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08e91d2fa9519a5f48d488176700499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d74ef32584586ec4857acd0a3f4fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/d930e5ed-e24d-4b6e-8f3c-0426d3389d94.png?resizew=268)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-05-08更新
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1570次组卷
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5卷引用:浙江省绍兴市柯桥区2023届高三5月高考及选考科目适应性考试数学试题
名校
5 . 四面体
中
,
,
,
,
,E为AC中点.
(1)证明:
;
(2)若二面角
的余弦值为
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dc39e2113669164b4894c2ef739f0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f51237a75bf0ea6fa0fde65cc43ab18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e8cfc92fac8debb8bc06293ccc1685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caedb55e1410c5083c2a8645008527a4.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4be6ee295b46490a1eed671b6975a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
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6 . 已知正方体
的棱长为1,
是棱
上的动点,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c851cf4994e90632536297d151badc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/20/00f0c16e-4f8b-4f02-8f62-937148ef7800.png?resizew=181)
A.![]() ![]() | B.![]() |
C.二面角![]() ![]() | D.三棱锥![]() ![]() |
您最近一年使用:0次
名校
解题方法
7 . 在四棱锥
中,
平面
,底面
为正方形,
,E和F分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/97e305e8-d789-4b54-a36b-cb69e8b2f3c5.png?resizew=165)
(1)证明:
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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/97e305e8-d789-4b54-a36b-cb69e8b2f3c5.png?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28b5b7b3ce8cfd88c3428883bd0852e.png)
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2023-04-27更新
|
1963次组卷
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3卷引用:浙江省浙南名校联盟2022-2023学年高一下学期期中联考数学试题
名校
解题方法
8 . 如图,在四棱锥
中,底面ABCD为直角梯形,且
,
,
,
,平面
平面ABCD,点M在线段PB上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
平面MAC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/069283ef-3933-49af-814e-9733ef78e143.png?resizew=187)
(1)判断M点在PB的位置并说明理由;
(2)记直线DM与平面PAC的交点为K,求
的值;
(3)若异面直线CM与PA所成角的余弦值为
,求二面角
的平面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57af480a5e2c688723d762b822fa51e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25eb757d05fbff80d50c3bb8dbcb8657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40560ea08d6cd8c1d4d9661ee6faaa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/069283ef-3933-49af-814e-9733ef78e143.png?resizew=187)
(1)判断M点在PB的位置并说明理由;
(2)记直线DM与平面PAC的交点为K,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da959c0ba06e6e3817ba8adafdac1c6.png)
(3)若异面直线CM与PA所成角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daffe333e60992bb4590370b79b806d5.png)
您最近一年使用:0次
2023-04-26更新
|
1717次组卷
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7卷引用:浙江省台州市第一中学2022-2023学年高一下学期期中数学试题
浙江省台州市第一中学2022-2023学年高一下学期期中数学试题(已下线)高一数学下学期第二次月考02(范围:平面向量,解三角形,复数,立体几何)(已下线)期末模拟试卷01-期中期末考点大串讲(已下线)第05讲 立体几何角度专题期末高频考点题型秒杀(已下线)第03讲 空间中平行、垂直问题10种常见考法归类(1)(已下线)模块二 专题5《立体几何初步》单元检测篇 B提升卷 (苏教版)(已下线)高一数学下学期期末模拟试卷01-【题型分类归纳】(苏教版2019必修第二册)
9 . 如图,多面体ABCDEF的8个面都是边长为2的正三角形,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/531f976d-9980-4ab7-b5d7-0b602078328a.png?resizew=154)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/531f976d-9980-4ab7-b5d7-0b602078328a.png?resizew=154)
A.![]() | B.平面![]() |
C.直线EA与平面ABCD所成的角为![]() | D.点E到平面ABF的距离为![]() |
您最近一年使用:0次
2023-04-25更新
|
2238次组卷
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8卷引用:浙江省稽阳联谊学校2023届高三下学期4月联考数学试题
浙江省稽阳联谊学校2023届高三下学期4月联考数学试题(已下线)专题05 立体几何海南省海口市海南中学2023届高三二模数学试题(已下线)高一下学期期末测试B卷(人教A版(2019)必修第二册全册:平面向量、复数、立体几何、概率统计)第八章 立体几何初步(单元测试)-【同步题型讲义】山东省新泰市第一中学(老校区)2022-2023学年高一下学期第二次阶段性考试数学试题江苏省无锡市天一中学2022-2023学年高一下学期期末数学试题(理强)河南省周口市太康县2022-2023学年高一下学期期中数学试题
10 . 如图,直三棱柱
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/b8fd9206-75e7-4fa1-b270-70934a3d4657.png?resizew=186)
(1)证明:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea02cbe8d8991fe4fead6cf4a5880b83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0965e1e82358070ca8cac70626a56af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f282afda17d50fd0e314a657186c0d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/b8fd9206-75e7-4fa1-b270-70934a3d4657.png?resizew=186)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5ea494bb75a5c04e61c9e32aceabc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983a45a4ef187b9cb0682d59a9dcfeaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff89a768c80c8200e6050dd052ae9fd9.png)
您最近一年使用:0次