名校
1 . 在四棱锥
中,底面
是边长为
的正方形,
平面
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/9483759d-98fd-46f1-86dc-b6cb0fc9806d.png?resizew=146)
(1)如果
与平面
所成的线面角为
,求证:
平面
.
(2)当
与平面
所成角的正弦值最大时,求三棱锥
的体积.
![](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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfaefb10f82b89802bb420b3c41de1bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/9483759d-98fd-46f1-86dc-b6cb0fc9806d.png?resizew=146)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076fdb31d17c86dbdc53da175c6ae90b.png)
您最近一年使用:0次
2023-02-10更新
|
661次组卷
|
3卷引用:福建省福州第二中学2023-2024学年高二上学期第二学段考试数学试题
名校
解题方法
2 . 在长方体
中,
,
,E为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/8541e781-6255-44fa-a375-427945769934.png?resizew=134)
(1)证明:
;
(2)求DE与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/8541e781-6255-44fa-a375-427945769934.png?resizew=134)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd90dd9df8047d6093a7fb228245bec3.png)
(2)求DE与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
您最近一年使用:0次
2023-01-28更新
|
445次组卷
|
10卷引用:福建省闽侯第六中学2017-2018学年高二上学期期末考试数学(理)试题
福建省闽侯第六中学2017-2018学年高二上学期期末考试数学(理)试题辽宁省实验中学、大连八中、大连二十四中、鞍山一中、东北育才学校2017-2018学年高二上学期期末考试数学(理)试题山东省临沂市蒙阴县实验中学2019-2020学年高二上学期期末考试数学试题福建省石狮市永宁中学2022-2023学年高二上学期第一次阶段考数学试题2016-2017北京西城14中高二上期中数学试题辽宁省实验中学东戴河分校2019-2020学年高二上学期12月月考数学试卷江苏省徐州市鼓楼区求实高中2022-2023学年高二上学期10月月考数学试题(已下线)第6章:空间向量与立体几何 章末检测试卷-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)广东省阳江市阳东区第一中学2022-2023学年高二上学期期中数学试题广东省深圳市福田区外国语高级中学2023-2024学年高二上学期期中数学试题
解题方法
3 . 已知圆锥
的轴截面为等边三角形,
都是底面圆
的直径,弧
的长度是弧
长度的
,母线
上有
两点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/ee849799-8243-47b9-8bb0-12f4b44ce67c.png?resizew=224)
(1)求
;
(2)求
与平面
所成角的正弦值;
(3)若底面圆
的半径为1,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6f5c97bf9968c6b47d8a8aeee6796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7495688c046142f688c822209c0e968e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/ee849799-8243-47b9-8bb0-12f4b44ce67c.png?resizew=224)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7495688c046142f688c822209c0e968e.png)
(3)若底面圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7495688c046142f688c822209c0e968e.png)
您最近一年使用:0次
4 . 如图,在三棱柱
中,
,
,且
在平面ABC内的正投影为BC上的点D.过D作平面
的垂线,垂足为E,连接
并延长交AB于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/ba2b411c-ea06-4225-b6ab-d55c4568bf37.png?resizew=270)
(1)证明:
平面
;
(2)若D为BC中点,求DE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/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e17995e2f71e297d94ae51c7e5b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/ba2b411c-ea06-4225-b6ab-d55c4568bf37.png?resizew=270)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26dee2a75ce2b52cdceefc5e863ac5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若D为BC中点,求DE与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
5 . 如图,在四面体ABCD中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/c81fde35-f708-4b8a-b85f-7d0c54e88c5e.png?resizew=171)
(1)求
的值;
(2)已知F是线段CD中点,点E满足
,求线段EF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2163a2634041c4f809051f99035cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/c81fde35-f708-4b8a-b85f-7d0c54e88c5e.png?resizew=171)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be919d72a83e0978c6411bb24902d6c7.png)
(2)已知F是线段CD中点,点E满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41dd2c64fc91c03e8cf5fb6b104790eb.png)
您最近一年使用:0次
2023-01-18更新
|
627次组卷
|
8卷引用:福建省三明市普通高中2022-2023学年高二上学期期末质量检测数学试题
福建省三明市普通高中2022-2023学年高二上学期期末质量检测数学试题(已下线)每日一题 第1题 巧用基底 别具一格(高二)山东省日照市2023-2024学年高二上学期期末校际联合考试数学试题(已下线)第03讲 1.2空间向量基本定理(4类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)(已下线)专题1.3 空间向量基本定理【八大题型】-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)第07讲 空间向量的数量积运算9种常见考法归类(1)(已下线)专题 01 空间基底及综合应用(3)(已下线)专题 01 空间基底及综合应用(2)
解题方法
6 . 如图,已知四边形
是直角梯形,
,
,
,
分别为
,
的中点,
,
,
,将四边形
沿
折起,使得点
,
分别到达点
,
的位置,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/ff9ea9c4-196b-4093-a883-e6aa29384e48.png?resizew=172)
(1)求线段
的长;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f3df5713a423887c16e6355236372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f39be8a9a8942bba83f2bf07891043a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/ff9ea9c4-196b-4093-a883-e6aa29384e48.png?resizew=172)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d81b79e82721e441bbfefbc3d96e5c.png)
您最近一年使用:0次
解题方法
7 . 在直角梯形ABCD中,
//
,
,如图把
沿
翻折,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/dc98d680-2e58-42b5-8eed-f0ca24a4cd8a.png?resizew=314)
(1)若点
为线段
中点,求点
到平面
的距离;
(2)在线段
上是否存在点
,使得
与平面
所成角为
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6f468031a7d3ef2d6977322b6ae761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/dc98d680-2e58-42b5-8eed-f0ca24a4cd8a.png?resizew=314)
(1)若点
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48732e80ec3c3b6de906d598c69840d5.png)
您最近一年使用:0次
名校
解题方法
8 . 平面上两个等腰直角
和
,
既是
的斜边又是
的直角边,沿
边折叠使得平面
平面
,
为斜边
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/4e0f162a-50f7-42f3-b762-091cea413364.png?resizew=223)
(1)求证:
.
(2)求
与平面
所成角的正弦值.
(3)在线段
上是否存在点
,使得平面
平面
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/4e0f162a-50f7-42f3-b762-091cea413364.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7ebf74ae4daefad4350f9d1103a891.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1b1b6da476086ecb79a3466b651097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b1e52dfd144ab4afda4d4aa5a92c1f.png)
您最近一年使用:0次
2023-01-04更新
|
619次组卷
|
4卷引用:福建省福州城门中学2023-2024学年高二上学期期末模拟数学试题
名校
解题方法
9 . 如图,在四棱锥
中,已知底面
是正方形,
底面
,且
是棱
上动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/6d39f7b1-cfc0-4e66-802e-0cac9eb1e70a.png?resizew=158)
(1)若过C,D,E三点的平面与平面PAB的交线是
,证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684a77998d27d5738f3e0cbb4a854ec6.png)
(2)线段
上是否存在点
,使二面角
的余弦值是
?若存在,求
的值;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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d5d5a464ed3f9a7fc9722c31a94f0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/6d39f7b1-cfc0-4e66-802e-0cac9eb1e70a.png?resizew=158)
(1)若过C,D,E三点的平面与平面PAB的交线是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684a77998d27d5738f3e0cbb4a854ec6.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a56f51a6312441f9f07daf7e62ff41.png)
您最近一年使用:0次
2022-12-15更新
|
894次组卷
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4卷引用:福建省永春第一中学2022-2023学年高二上学期期末考试数学试题
福建省永春第一中学2022-2023学年高二上学期期末考试数学试题江西省丰城中学2022-2023学年高二上学期期末数学试题广东省深圳市盐田高级中学2023届高三上学期11月月考数学试题(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点2 立体几何存在性问题的解法综合训练【培优版】
名校
10 . 已知直三棱柱ABC-A1B1C1中,侧面AA1B1B为正方形,AB=BC=2,且
,E,F分别为AC和CC1的中点,D为棱
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5a095d97-09d4-47ca-8e1d-c77895debbff.png?resizew=135)
(1)证明:
;
(2)在棱A1B1上是否存在一点M,使得异面直线MF与AC所成的角为30°? 若存在,指出M的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5a095d97-09d4-47ca-8e1d-c77895debbff.png?resizew=135)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7a3dc3f3a02f4400e22dec2f2fee23.png)
(2)在棱A1B1上是否存在一点M,使得异面直线MF与AC所成的角为30°? 若存在,指出M的位置;若不存在,说明理由.
您最近一年使用:0次
2022-12-13更新
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467次组卷
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5卷引用:福建省福州市山海联盟教学协作体2022-2023学年高二上学期期末考试数学试题
福建省福州市山海联盟教学协作体2022-2023学年高二上学期期末考试数学试题黑龙江省哈尔滨市第四中学校2022-2023学年高二上学期第一次月考数学试题(已下线)第11讲 用空间向量研究距离、夹角问题11种常见考法归类-【暑假自学课】2023年新高二数学暑假精品课(人教A版2019选择性必修第一册)(已下线)模块三 专题1 利用空间向量求解探究性问题和最值问题(已下线)专题05用空间向量研究距离、夹角问题(2个知识点6种题型1个易错点1种高考考法)(1)