1 . 如图,长方体
中,
,点M是棱
的中点,点E在
上,且
.
平面
;
(2)求平面
与平面
的夹角的余弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273c489a7a63cfcf207e844ff28e2cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed357ec154cc4d69f9cfd278ac2015d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
2 . 如图,四棱锥
中.底面
为矩形,
平面
,M,N分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/16b4597e-42ed-4800-861d-b1fa4a78f86d.png?resizew=165)
(1)若点E是线段
的中点.证明:
平面
;
(2)设
,
,
,线段
上是否存在点E,使得
与平面
所成角
的正弦值为
.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/16b4597e-42ed-4800-861d-b1fa4a78f86d.png?resizew=165)
(1)若点E是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98823cbc09ca52df1fbcc446eba3e44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
您最近一年使用:0次
名校
3 . 如图,在正三棱柱
中,点
是棱
的中点,点
是线段
上的一点.
是线段
的中点,证明:
平面
;
(2)若
,直线
与平面
所成角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826bf6fa3706921b77ad0eb4fcc206bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c5282bc1ea20767a6c092c22c761ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c407eeb34204a1df967b8fbe481cb04d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67bcbbe45d85faa55a993dafe149e97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f45f88103af83ec0adb9ee76216385f.png)
您最近一年使用:0次
2023-09-17更新
|
393次组卷
|
3卷引用:贵州省六盘水市盘州市第一中学2023-2024学年高二上学期期中模拟考试数学试题
名校
4 . 如图,四棱锥
中,侧面
为等边三角形且垂直于底面
,四边形
为梯形,
,
.
![](https://img.xkw.com/dksih/QBM/2023/7/11/3278471443767296/3302856519516160/STEM/84b91d3e6ec048879375bf62dd058ba7.png?resizew=221)
(1)若
为
的中点,求证:
平面
;
(2)若直线
与平面
所成角的正弦值为
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.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/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83b76a280fc562446ee8ddd2d6bf1d4.png)
![](https://img.xkw.com/dksih/QBM/2023/7/11/3278471443767296/3302856519516160/STEM/84b91d3e6ec048879375bf62dd058ba7.png?resizew=221)
(1)若
![](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/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f75c42c77264076166fff76cfab4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-08-14更新
|
944次组卷
|
3卷引用:贵州省黔西南州兴义市第六中学2022-2023学年高二下学期期中检测数学试题
5 . 如图,在四棱锥
中,
平面
,底面
是正方形,点F为棱PD的中点,
.
(1)若E是BC的中点,证明:
平面
;
(2)求直线CF与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/d3f676fe15b57d8e4b2fb3458e3532a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/e527103a-2471-402f-afe9-bb6f3e65a93d.png?resizew=165)
(1)若E是BC的中点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94270844f197d524bf1da4f1385befd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)求直线CF与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次
6 . 如图,在长方体
中,底面
是边长为2的正方形,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/efd708db-d28e-4896-b142-e6c2538de740.png?resizew=155)
(1)证明:
∥平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/efd708db-d28e-4896-b142-e6c2538de740.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
2022-11-13更新
|
547次组卷
|
5卷引用:贵州省2022-2023学年高二上学期期中联合考试数学试题
名校
解题方法
7 . 如图,在正方体
中,E为
的中点,F为
的中点.
(2)求直线DE,BF所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
(2)求直线DE,BF所成角的余弦值.
您最近一年使用:0次
2022-11-04更新
|
485次组卷
|
8卷引用:贵州省黔东南六校联盟2022-2023学年高二上学期期中联考数学试题(A)
贵州省黔东南六校联盟2022-2023学年高二上学期期中联考数学试题(A)贵州省黔东南六校联盟2022-2023学年高二上学期期中联考数学试题(B)新疆维吾尔自治区伊犁哈萨克自治州霍城县江苏中学2022-2023学年高二上学期期中考试数学试题(已下线)高二上期中真题精选(压轴60题30个考点专练)【考题猜想】-2023-2024学年高二数学上学期期中考点大串讲(人教A版2019选择性必修第一册)甘肃省武威市天祝一中、民勤一中2023-2024学年高二下学期5月期中考试数学试题河南省平顶山市叶县高级中学2023-2024学年高二上学期10月月考数学试题山西省朔州市怀仁市第一中学校2023-2024学年高二上学期第三次月考(11月)数学试题云南省曲靖市宣威市第九中学2023-2024学年高二下学期第二次月考数学试卷
名校
解题方法
8 . 《九章算术》是我国古代数学专著,书中将底面为矩形且一条侧棱垂直于底面的四棱锥称为“阳马”.如图,在阳马
中,
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/969fb55e-8d7e-4294-9ade-594df6e412b4.png?resizew=165)
(1)求证:
平面
;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/969fb55e-8d7e-4294-9ade-594df6e412b4.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a976a64deadb0b4e0f9bdb26a6dc594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3ffec2558e590c0712e77d7ab27ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40f5583fbfcac922c8ec238c0438452.png)
您最近一年使用:0次
2023-02-26更新
|
1174次组卷
|
4卷引用:贵州省遵义市红花岗区部分学校2022-2023学年高二下学期期中考试数学试题
名校
9 . 如图,正方体
中,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/82822081-e42f-440f-8112-f61f3f311ceb.png?resizew=166)
(1)证明:
平面
;
(2)求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362ef25f87ac1de47027b7d7c150a56c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/82822081-e42f-440f-8112-f61f3f311ceb.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a407b262c22419f73396170ecdc849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c878e789e07e33d65c8a18cf2c58a.png)
您最近一年使用:0次
2022-10-08更新
|
1497次组卷
|
9卷引用:贵州省黔东南州从江县第一民族中学2022-2023学年高二上学期期中质检测试数学试题
贵州省黔东南州从江县第一民族中学2022-2023学年高二上学期期中质检测试数学试题天津市北辰区2022-2023学年高二上学期期中数学试题广东省深圳市福田区红岭中学2022-2023学年高二上学期期中数学试题浙江省杭州东方中学2022-2023学年高二上学期期中数学试题重庆市第八中学校2022-2023学年高二上学期第一次月考数学试题重庆市铜梁一中等三校2022-2023学年高二上学期期末数学试题云南省保山市高(完)中C、D类学校2022-2023学年高二上学期10月份联考数学试题(已下线)河北省石家庄市河北省实验中学2024届高三上学期名校联考数学试题变式题19-22(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)
10 . 如图,在四棱锥
中,四边形ABCD为正方形,PA⊥底面ABCD,
,M,N分别为AB和PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/324c0276-5cd4-44b4-b3be-98b169d6669f.png?resizew=163)
(1)求证:MN//平面PAD;
(2)求平面MND与平面PAD的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/324c0276-5cd4-44b4-b3be-98b169d6669f.png?resizew=163)
(1)求证:MN//平面PAD;
(2)求平面MND与平面PAD的夹角的余弦值.
您最近一年使用:0次
2022-02-15更新
|
461次组卷
|
3卷引用:贵州省黔西南州兴义市顶效开发区顶兴学校2022-2023学年高二下学期期中考试数学试题
贵州省黔西南州兴义市顶效开发区顶兴学校2022-2023学年高二下学期期中考试数学试题福建省福州市八县(市、区)一中2021-2022学年高二上学期期末联考数学试题(已下线)解密15 空间向量与立体几何 (分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)