1 . 在三棱锥中,
和
都是等边三角形,
,
,
为棱
上一点,则
的最小值是
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2 . 如图,在梯形中,
,
,
,四边形
为矩形,平面
平面
,
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbc56d42b003cbcb1fbe5c50e55b26b.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
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2024-03-25更新
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379次组卷
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2卷引用:浙江省杭州四中2023-2024学年高二上学期期末数学试题
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解题方法
3 . 设
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9745f117d6195d82a7093a8b7ac5726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d18d5cc420cc3e8a0cc612db4d9b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb6355c7ddd1c545ccf474bb551f095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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4 . 在直三棱柱
中,各棱长均为2,其顶点都在同一球面上,则该球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-03-21更新
|
1922次组卷
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5卷引用:高二数学下学期期末押题试卷02(测试范围:新高考全部内容)-【好题汇编】备战2023-2024学年高二数学下学期期末真题分类汇编(新高考专用)
(已下线)高二数学下学期期末押题试卷02(测试范围:新高考全部内容)-【好题汇编】备战2023-2024学年高二数学下学期期末真题分类汇编(新高考专用)内蒙古赤峰市2024届高三下学期3.20模拟考试文科数学试题(已下线)8.3简单几何体的表面积与体积【第三练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)高一 模块3 专题1 小题入门夯实练(已下线)11.1空间几何体-同步精品课堂(人教B版2019必修第四册)
名校
解题方法
5 . 如图,在四棱锥
中,平面
平面ABCD,
,
,M为棱PC的中点.
平面PAD;
(2)若
,
(i)求二面角
的余弦值;
(ii)在线段PA上是否存在点Q,使得点Q到平面BDM的距离是
?若存在,求出PQ的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be80fe6e1bdcd8f7ac98afaaff031530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c098151bc644ca1eda2a76032927f82d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f2acab56e2002173333e27b5738416.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c651b55c0ad7f63e3451557ab4c378be.png)
(i)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678bd649fc4c7e780f785e2fc704bd89.png)
(ii)在线段PA上是否存在点Q,使得点Q到平面BDM的距离是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c76e558109d9b8dd700c1a7f9cc73ad.png)
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1373次组卷
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7卷引用:专题03空间向量及其应用--高二期末考点大串讲(沪教版2020选修)
(已下线)专题03空间向量及其应用--高二期末考点大串讲(沪教版2020选修)江苏省盐城市五校联考2023-2024学年高二下学期第一次学情调研检测(3月)数学试题湖南省常德市汉寿县第一中学2023-2024学年高二下学期3月月考数学试题上海市格致中学2023-2024学年高二下学期期中考试数学试题福建省莆田第二十五中学2023-2024学年高二下学期期中考试数学试题(已下线)专题03 空间向量及其应用全章复习攻略--高二期末考点大串讲(沪教版2020选修)(已下线)专题02 空间向量与立体几何--高二期末考点大串讲(苏教版2019选择性必修第二册)
6 . 如图,在三棱锥中,点
满足
,则
( )
A.![]() | B.![]() | C.2 | D.![]() |
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2024-03-21更新
|
423次组卷
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2卷引用:贵州省黔东南州2023-2024学年高二上学期期末检测数学试题
7 . 在三棱锥
中,M是线段
的中点,
,
,
,
.
(1)证明:P在平面
内的射影O为
的垂心;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3735a467f788624fe63946e0da5b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fe75f967e8915c9124a5d4ac420a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827c7d9ca8f0e06a09bd37e930b3c3ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/d44cbe49-473b-42e9-a1e4-0a171e6be968.png?resizew=156)
(1)证明:P在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
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8 . 如图,在四面体
中,
分别是
上的点,且
是
和
的交点,以
为基底表示
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a337a934b801730321f67b0e5a0b144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85a08b7404da7ee0fa373540966176b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1408c55c40465b26758562f59d99ae41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6d728b430549f00bb9c0a7bf8bf7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/fb89f17c-87a6-403f-bc75-f41656266583.png?resizew=154)
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9 . 在长方体中,点
,
分别在
,
上,且
,
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab6bf42c7db96104456424e4d1be6c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367bd05a164d12706243484da3c43e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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解题方法
10 . 如图,在四棱锥
中,
面
,且
,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c8482f3c-817c-4c24-8721-fc34280f59d9.png?resizew=171)
(1)求证:
平面
;
(2)在平面
内是否存在点
,满足
,若不存在,请简单说明理由;若存在,请写出点
的轨迹图形形状.
![](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/1bcf75eebbbc06b7571c869debc3db6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c98d5943239266fd56121a5a9e241ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1457d2e76a5b86de1abf121c51eb9d35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c8482f3c-817c-4c24-8721-fc34280f59d9.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2da5312b15f602fcb8c0ffe9ea57a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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