名校
解题方法
1 . 已知向量
,
分别为平面
和平面
的法向量,则平面
与平面
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c77cdd5910379ca3a545dee79be603a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248b093232539c55282c0e7508156150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
2 . 如图,在四棱锥
中,底面
是矩形,
平面
,
,
,
是
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a4d789d9-7164-428a-8932-b1b2a27146a5.png?resizew=141)
(1)证明:
平面
;
(2)求平面
与平面
的夹角的余弦值.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a148e1cc59be85f85f41cafabeae11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875cd2860fb57cedf932aa0535d2e1da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a4d789d9-7164-428a-8932-b1b2a27146a5.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c982eb645d77aa24c642fca6d72e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
2022-11-15更新
|
4677次组卷
|
11卷引用:广西钦州市2022-2023学年高二上学期期末考试数学试题
广西钦州市2022-2023学年高二上学期期末考试数学试题安徽省阜阳市阜南县2022-2023学年高二上学期期末联考数学试题黑龙江省绥化市绥棱县第一中学2022-2023学年高一下学期期末数学试题陕西省西安市周至县第四中学2023-2024学年高二上学期期末数学试题吉林省吉林市2022-2023学年高二上学期期中数学试题四川省成都新津为明学校2022-2023学年高二下学期第一次月考数学(理科)试题云南省宣威市第三中学2022-2023学年高二下学期第二次月考数学试题新疆维吾尔自治区喀什地区喀什第六中学2022-2023学年高二上学期11月月考数学试题吉林省长春市长春外国语学校2022-2023学年高二下学期期中数学试题广东省惠州市华罗庚中学2023-2024学年高二上学期11月月考数学试题广东省深圳市罗湖高级中学2023-2024学年高二上学期12月阶段性考试数学试题
3 . 如图所示,正三棱柱
内接于圆柱
,
,
,点
在轴
上运动.
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644425979879424/2646127277801472/STEM/dddc6373-972c-4fcb-9e6a-6ab942fc029d.png)
(1)证明:不论
在何处,总有
;
(2)当点
为
的中点时,求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725e89ad970de71e324ada90f1436dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644425979879424/2646127277801472/STEM/dddc6373-972c-4fcb-9e6a-6ab942fc029d.png)
(1)证明:不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e63d36d956e7e9e914070965b18733.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a571745474520e3db9cb68c76585f63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
您最近一年使用:0次
4 . 如图所示,已知AB为圆O的直径,且
,点D为线段AO的中点,点C为圆O上的一点,且
,
平面ABC,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/a52d6b73-cd7f-4bd3-af8d-4e36d611e90b.png?resizew=163)
(1)求证:
平面PAB.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6578a410d851ffd69a9e5cdc5945eb16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/a52d6b73-cd7f-4bd3-af8d-4e36d611e90b.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
您最近一年使用:0次
解题方法
5 . 如图,已知正三棱柱
的所有棱长均为2,则直线
与平面
所成角的正弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/0f9abc86-7427-4d2e-8603-3c7b31982c0c.png?resizew=148)
您最近一年使用:0次
名校
解题方法
6 . 长方体
中,
,
,E为
中点,则异面直线
与CE所成角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f5dd01b683fcab010fc6ff5558c9e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-18更新
|
218次组卷
|
3卷引用:广西壮族自治区钦州市2019-2020学年高二上学期期末数学(理)试题
7 . 如图,在三棱柱
中,侧棱
底面
,
,
,点
分别是
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/1576f624-1c30-43db-aff5-6c8d2221f713.png?resizew=166)
(1)证明:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326a3339175592bd1e793a9054d57fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3509e256c6cf369938d60851bd7673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac0b506bfe83f481a5c3780097d7eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57e3727b7bbd795b05332fbf9649e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b362fffbd6e0fef50ca51fc300d23d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846a84e40de724b4c60a20c4faa194b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/1576f624-1c30-43db-aff5-6c8d2221f713.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b5f031f72f6c869e9017d7ce991fc6.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3315a8c8a31528c9109314b148bac5d2.png)
您最近一年使用:0次
2019-02-05更新
|
481次组卷
|
2卷引用:【市级联考】广西钦州市2018-2019学年高二上学期期末考试数学(理)试题
8 . 如图,在四棱锥
中,侧面
底面
,且
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/13eea9fd-b935-44af-81c4-e632a253e5d5.png?resizew=229)
(1)求证:
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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf34f13c17a34abed0c77997cc683055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32007c066a919ba1b69928dff48c6689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/13eea9fd-b935-44af-81c4-e632a253e5d5.png?resizew=229)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4c60cb9a31fce2ff65ddd03194c8ed.png)
您最近一年使用:0次
2017-10-22更新
|
2724次组卷
|
4卷引用:2016届广西钦州市钦州港经济技术开发区中学高三上学期期末理科数学试卷