名校
解题方法
1 . 已知三棱锥
(如图一)的平面展开图(如图二)中,四边形
为边长等于
的正方形,
和
均为正三角形,在三棱锥
中;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/f1f55a81-10c0-4a47-89f6-3bb0b44869cd.png?resizew=330)
(1)证明:平面
平面
;
(2) 若点
在棱
上运动,当直线
与平面
所成的角最大时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/f1f55a81-10c0-4a47-89f6-3bb0b44869cd.png?resizew=330)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2) 若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98553247801c03de24cf7e687016e655.png)
您最近一年使用:0次
名校
2 . 已知四棱柱
中,底面
为菱形,
,
为
中点,
在平面
上的投影
为直线
与
的交点.
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6be7370058c9b0b4dd6fe7d999dfa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d98c843d3cc814335f8d4796bf131d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6b00aa8eb26bee3d039144c2c8cfaf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7330a47ee62725071b8df19e0f748c.png)
您最近一年使用:0次
2020-03-16更新
|
888次组卷
|
3卷引用:江西省景德镇一中2019-2020学年高二上学期期末考试数学试题
解题方法
3 . 在三棱柱
中,侧面
平面
,
为
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4172ccab-bcd8-43ef-ae7c-2efa45050045.png?resizew=182)
(1)在
上是否存在一点
,使得
,若存在,求出
的值,不存在,说明理由;
(2)在线段
上有一点
,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fc8b7dd88091bbacb2eadb9eb076a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a252001e9b7edcba240973a32ab3fb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399572bdc5816897500121034d1100c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4172ccab-bcd8-43ef-ae7c-2efa45050045.png?resizew=182)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196d35152391d24d9fba74a81e4e77de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf4f65b436e6dd12cbe7d06565bc394.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c992bfc8f83c19e3acc690abcd0c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63884ba9b24c3729315d0bb8a230d66.png)
您最近一年使用:0次
解题方法
4 . 如图,五面体
中,四边形
为矩形,
平面
,
,
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/e896efb7-9d68-4394-938b-917ec5607108.png?resizew=168)
(1)求证:
平面
;
(2)若平面
平面
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab49c228b28d5a62592c66e9d00887ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/e896efb7-9d68-4394-938b-917ec5607108.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade8233bc5e455bc00825e081647519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
解题方法
5 . 如图,在棱长为1的正方体
中,
为
中点,则直线
与平面
所成角的正弦值是
![](https://img.xkw.com/dksih/QBM/2020/3/4/2412226998370304/2412452955865088/STEM/f568b2c0-acea-4097-b20f-8ce5ad02f714.png?resizew=231)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://img.xkw.com/dksih/QBM/2020/3/4/2412226998370304/2412452955865088/STEM/f568b2c0-acea-4097-b20f-8ce5ad02f714.png?resizew=231)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
6 . 已知四棱锥
的底面ABCD是直角梯形,AD//BC,
,
E为CD的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aaef9e92d148afff22761d5e027d3ee.png)
平面ABCD;
(2)若
,PC与平面ABCD所成的角为
,试问“在侧面PCD内是否存在一点N,使得
平面PCD?”若存在,求出点N到平面ABCD的距离;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5538f242e33c37e24458a6bc8e2e7f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aaef9e92d148afff22761d5e027d3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6da9f598fecf6fcf41cd65b45cbe08.png)
您最近一年使用:0次
2019-11-19更新
|
1573次组卷
|
11卷引用:江西省景德镇市乐平中学2023-2024学年高二上学期11月期中考试数学试题
江西省景德镇市乐平中学2023-2024学年高二上学期11月期中考试数学试题人教B版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 1.2.5 空间中的距离辽宁省大连市大连王府高级中学有限公司2023-2024学年高二上学期10月月考数学试题湖北十堰市部分普通高中2023-2024学年高二上学期11月期中数学试题福建省泉州市泉州九中与侨光中学2023-2024学年高二上学期12月联考数学试题湖北省武汉市东西湖区华中师范大学第一附属中学2019-2020学年高三上学期期中数学(理)试题(已下线)5.2 直线 平面平行与垂直的判定与性质[理]-《备战2020年高考精选考点专项突破题集》湖南省益阳市箴言中学2021届高三下学期十模试数学试题(已下线)13高考大题综合训练[理]-《备战2020年高考精选考点专项突破题集》福建省厦门第一中学2023届高三四模数学试题福建省厦门第一中学2024届高三上学期数学第一次(10月)月考数学试题
11-12高三上·江苏·阶段练习
名校
7 . 如图所示,在四棱柱ABCD-A1B1C1D1中,侧棱A1A⊥底面ABCD,AB⊥AC,AB=1,AC=AA1=2,AD=CD=
,E为棱AA1上的点,且AE=
.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948679275102208/2949328434659328/STEM/c56023642fa240e095d7c7549ffe27d6.png?resizew=184)
(1)求证:BE⊥平面ACB1;
(2)求二面角D1-AC-B1的余弦值;
(3)在棱A1B1上是否存在点F,使得直线DF∥平面ACB1?若存在,求A1F的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948679275102208/2949328434659328/STEM/c56023642fa240e095d7c7549ffe27d6.png?resizew=184)
(1)求证:BE⊥平面ACB1;
(2)求二面角D1-AC-B1的余弦值;
(3)在棱A1B1上是否存在点F,使得直线DF∥平面ACB1?若存在,求A1F的长;若不存在,请说明理由.
您最近一年使用:0次
2022-04-02更新
|
1066次组卷
|
9卷引用:江西省景德镇市乐平中学2021-2022学年高二下学期期末质量检测数学(理)试题
江西省景德镇市乐平中学2021-2022学年高二下学期期末质量检测数学(理)试题人教A版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 1.4 综合拔高练四川省成都市2022届高二下学期零诊数学理科模拟押题卷(一)(已下线)2012届江苏省运河中学高三上学期学情调研数学试卷(12月3日)北京市通州区高三三模数学试题(已下线)专题04 立体几何——2019年高考真题和模拟题理科数学分项汇编(已下线)卷02-2020年高考数学冲刺逆袭必备卷(山东、海南专用)【学科网名师堂】(已下线)类型三 立体几何与空间向量-【题型突破】备战2022年高考数学二轮基础题型+重难题型突破(新高考专用)(已下线)专题24 立体几何解答题最全归纳总结-1
名校
8 . 如图,
是
的中点,四边形
是菱形,平面
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203502763442176/2203604137820160/STEM/a9e81c1fd661437d9d8341974f51b42b.png?resizew=204)
(1)若点
是线段
的中点,证明:
平面
;
(1)求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b6711e6dd48be6cf8fa52926924d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb6bfe99d25013d16cf0a6c7ff8052c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203502763442176/2203604137820160/STEM/a9e81c1fd661437d9d8341974f51b42b.png?resizew=204)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
2018-03-28更新
|
1408次组卷
|
7卷引用:江西省景德镇一中2020-2021学年高二上学期期末考试数学(理)试题
名校
9 . 在四棱锥
中,
是等边三角形,底面
是直角梯形,
,
,
是线段
的中点,
底面
,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/2d08b147-0509-4d2b-845e-32f9e82de129.png?resizew=197)
(1)求二面角
的正弦值;
(2)试在平面
上找一点
,使得
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb26addf5271a5f083f9c4fd96b27b4c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/2d08b147-0509-4d2b-845e-32f9e82de129.png?resizew=197)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3037f05f0489fc6739dc5498158ea594.png)
(2)试在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53569e6ec795658b4fffcddeebe0f142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2018-02-24更新
|
1278次组卷
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4卷引用:江西省景德镇一中2022-2023学年高二(重点班)上学期期中考试数学试题
江西省景德镇一中2022-2023学年高二(重点班)上学期期中考试数学试题安徽省滁州市定远县育才学校2022-2023学年高二上学期期末数学试题(已下线)专题09 空间向量中动点的设法2种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)江苏省无锡市2018届高三第一学期期末检测数学试卷
名校
解题方法
10 . 如图,在斜三棱柱
中,已知
,异面直线
,且
.
![](https://img.xkw.com/dksih/QBM/2018/2/11/1880072495972352/1883602523889664/STEM/5ed926058bed4c04b43a01a57df5f836.png?resizew=169)
(1)求证:平面
平面
;
(2)若
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d649bb314476637f763f3a951bc1a8c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e5dc81fbafbe58bff0842f7776d80a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fe926770d2354e172dec02f5ce2efe.png)
![](https://img.xkw.com/dksih/QBM/2018/2/11/1880072495972352/1883602523889664/STEM/5ed926058bed4c04b43a01a57df5f836.png?resizew=169)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b55e5bb3db3b15a27cde03ee5fcaed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
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