1 . 如图,在多面体
中,四边形
为菱形,平面
平面
,平面
平面
是等腰直角三角形,且
.
平面
;
(2)若
,求平面
与平面
所成锐二面角的余弦值的取值范围.
![](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/ff0e7e1ea69f9f455e8496304b6a30c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde1e200d1dd5ddc433c876c9d2f688c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db74cdd38ce73c5631cad19c1f39804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76474dae014dc19bcbe7c1919a6d3044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d98d25467d8a11ddeeb1e6e18eb704f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fffcd1e524b0c7ef79f84384817293.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
2024-06-03更新
|
703次组卷
|
4卷引用:四川省雅安市神州天立学校2024届高三高考适应性考试(三)数学(理)试题
四川省雅安市神州天立学校2024届高三高考适应性考试(三)数学(理)试题四川省眉山市2024届高三下学期第三次诊断考试理科数学试题(已下线)第4套 新高考全真模拟卷(三模重组)(已下线)易错点4 忽视法向量夹角与二面角的关系
2 . 四棱锥
中,
,底面
为等腰梯形,
,
为线段
的中点,
.
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42de572d68ded125eccccc512c4fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98c8e36238ad90378e724466fcb6023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13f4b2ef8546f941aee8c051132d49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5148e7fc64ac3fed107192236f8e129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8825d400f453c5c17a7beeb1cc9a9cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
您最近一年使用:0次
解题方法
3 . 如图,在三棱锥
中,M为AC边上的一点,
,
,
,
.
平面
;
(2)若直线PA与平面ABC所成角的正弦值为
,且二面角
为锐二面角,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94b7928ff6145cccd4b64b0010a585d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75935f499493a6bdf92cab5ed82abe1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a910c896750506ffc2f8e29ce96435bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f85db6f28f09fe9382a3ba571875f8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
(2)若直线PA与平面ABC所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039b5d69307f03fc40103a37f4b0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e820aec9c1a975242fe6d76408a9cde8.png)
您最近一年使用:0次
2024-04-15更新
|
750次组卷
|
3卷引用:四川省雅安市2024届高三下学期二诊数学(理)试题
名校
4 . 如图,在三棱柱
中,直线
平面
,平面
平面
.
;
(2)若
,在棱
上是否存在一点
,使二面角
的余弦值为
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ad7c180d6d084ecb25f23cb6fe9b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1de5964353beb55c5058b2a431eecaf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9008767d531e72e94dee8452aedca97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c23129f02a89e68ca40c08b32563475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69d166677557cadb3da32b4a7e152e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55abe7008585043c035ade44c9b54398.png)
您最近一年使用:0次
2024-01-03更新
|
3481次组卷
|
18卷引用:四川省雅安市2024届高三一模数学(理)试题
四川省雅安市2024届高三一模数学(理)试题四川省遂宁市2024届高三一模数学(理)试题四川省资阳市2024届高三二模数学(理)试题四川省眉山市2024届高三一模数学(理)试题江西省赣州市南康中学2024届高三上学期七省联考考前数学猜题卷(六)陕西省西安中学2024届高三模拟考试(一)数学(理科)试题陕西省西安市陕西师范大学附属中学2023-2024学年高三第六次模考数学(理科)试题四川省广安市2024届高三一模数学(理)试题江苏省镇江市第一中学2024届高三上学期1月学情检测调研数学试题湖北省黄冈市浠水县第一中学2024届高三上学期期末数学试题(已下线)专题13 空间向量的应用10种常见考法归类(4)(已下线)高二数学开学摸底考 01(人教A版,范围:空间向量与立体几何+直线与圆+圆锥曲线+数列)-2023-2024学年高二数学下学期开学摸底考试卷河北省石家庄市第二中学2023-2024学年高二上学期期末模拟一数学试题河南省郑州市宇华实验学校2024届高三下学期开学摸底考试数学试题四川省宜宾市第六中学校2024届高三上学期期末数学(理)试题(已下线)专题05 空间向量与立体几何(分层练)(四大题型+21道精选真题)(已下线)2024年高考数学全真模拟卷06(新题型地区专用)(已下线)重难点12 立体几何必考经典解答题全归类【九大题型】
名校
解题方法
5 . 如图,在正方体
中,点
是线段
上的动点(含端点),点
是线段
的中点,设
与平面
所成角为
,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/f2c6054b-9d63-4ce7-a926-7616b78a42c7.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/f2c6054b-9d63-4ce7-a926-7616b78a42c7.png?resizew=157)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-03更新
|
1043次组卷
|
11卷引用:四川省雅安市2024届高三一模数学(理)试题
四川省雅安市2024届高三一模数学(理)试题四川省遂宁市2024届高三一模数学(理)试题四川省资阳市2024届高三二模数学(理)试题四川省眉山市2024届高三一模数学(理)试题四川省广安市2024届高三一模数学(理)试题江西省上饶市广丰贞白中学2024届高三上学期1月考试数学试题河北省石家庄市正定中学2023-2024学年高二上学期期末数学试题四川省宜宾市第六中学校2024届高三上学期期末数学(文)试题(已下线)重难点6-1 空间角与空间距离的求解(8题型+满分技巧+限时检测)四川省宜宾市第六中学校2024届高三上学期期末数学(理)试题(已下线)第二章 立体几何中的计算 专题七 空间范围与最值问题 微点6 角度的范围与最值问题(一)【基础版】
名校
解题方法
6 . 如图,四棱锥
的底面是矩形,
底面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/f760394e-3343-4ec9-a36e-5fa78a915003.png?resizew=175)
(1)试在棱BC上确定一点M,使得平面
平面
,并说明理由.
(2)在第(1)问的条件下,求二面角
的余弦值.
![](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/c325541132dc286007c589e229b82e41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/f760394e-3343-4ec9-a36e-5fa78a915003.png?resizew=175)
(1)试在棱BC上确定一点M,使得平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392469b357b12b998528499929366c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)在第(1)问的条件下,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2547225b7d1f17b04a2077258be59ee7.png)
您最近一年使用:0次
2022-12-28更新
|
833次组卷
|
5卷引用:四川省雅安市2023届高三第一次诊断性考试数学(理)试题
7 . 如图①,
为边长为6的等边三角形,E,F分别为AB,AC上靠近A的三等分点,现将
沿EF折起,使点A翻折至点P的位置,且二面角
的大小为120°(如图②).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/ecc28a62-6c40-409f-a2f8-e61e9fba1aa3.png?resizew=321)
(1)在PC上是否存在点H,使得直线
平面PBE?若存在,确定点H的位置;若不存在,说明理由.
(2)求直线PC与平面PBE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f8c417f5c19cc076dc6baeb0c173a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/ecc28a62-6c40-409f-a2f8-e61e9fba1aa3.png?resizew=321)
(1)在PC上是否存在点H,使得直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f7dd424c1184e0656dcdad0e8b6d84.png)
(2)求直线PC与平面PBE所成角的正弦值.
您最近一年使用:0次
8 . 如图,在直三棱柱
中,
,
,
,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981422843977728/2982000731815936/STEM/35e8bf32-86f6-4804-9f12-97ee7a86e77e.png?resizew=145)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfaf94af8e01d6d6a5c4273ed8076c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025df2a9934b457cf20d91604e430612.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/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981422843977728/2982000731815936/STEM/35e8bf32-86f6-4804-9f12-97ee7a86e77e.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f0b465713f1706416407ea1e1ea50c.png)
您最近一年使用:0次
9 . 如图(1),已知
是边长为6的等边三角形,点
,
分别在
,
上,
,
是线段
的中点.将
沿直线
进行翻折,
翻折到点
,使得二面角
是直二面角,如图(2).
![](https://img.xkw.com/dksih/QBM/2022/3/22/2941815315415040/2942384728064000/STEM/b3a8cbb4171042ae844ccdadbe99bb13.png?resizew=333)
(1)若
平面
,求
的长;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e987ef5b2677d3b860a9882770ac718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd02de808929ae04eb4185ef14592720.png)
![](https://img.xkw.com/dksih/QBM/2022/3/22/2941815315415040/2942384728064000/STEM/b3a8cbb4171042ae844ccdadbe99bb13.png?resizew=333)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7767d492158189b23af332a8016ed37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f457418e6a7e21f0ed0bf490a3709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4193a34cda561b6404996e8050d404af.png)
您最近一年使用:0次
2022-03-23更新
|
575次组卷
|
5卷引用:四川省雅安市2022届高三第二次诊断性考试数学(理工)试题
10 . 如图,在长方体
中,
,点
是
的中点,
在
上,且
.若过
的平面
交
于
,交
于
.
![](https://img.xkw.com/dksih/QBM/2021/12/11/2870180630347776/2870846225260544/STEM/43975781-473e-411b-a322-f0735fe6a9f9.png?resizew=235)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)若点
是
的中点,求平面
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/d71121f0da778645dbe350e07b66f242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be41b05e11ba5eadaaed9a224b949774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/2021/12/11/2870180630347776/2870846225260544/STEM/43975781-473e-411b-a322-f0735fe6a9f9.png?resizew=235)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1956db288a5a3b8c97d2539e9e5e4f85.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013e58ab92ebfc889e2e0e2be903792e.png)
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