1 . 如图,在四棱锥
中,底面为直角梯形,
,
.
底面
,且
,
、
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/549622f0-253e-40f3-a2a8-3bac684bf1ab.png?resizew=100)
(1)求证:
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.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/0ae172ead4020c20f9618b4f540e8044.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/549622f0-253e-40f3-a2a8-3bac684bf1ab.png?resizew=100)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962515007ca98ad2d36557b60a42ad6f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36a631b790fbfabb6a41f44c7445126.png)
您最近一年使用:0次
2020-03-24更新
|
369次组卷
|
3卷引用:2019届四川省凉山州高三第三次诊断性检测数学(理)试题
2019届四川省凉山州高三第三次诊断性检测数学(理)试题(已下线)第34讲 利用坐标法解决立体几何的角度与距离问题-2022年新高考数学二轮专题突破精练新疆维吾尔自治区喀什地区疏附县2023届高三上学期11月期中考试数学(理)试题
名校
解题方法
2 . 如图,三棱锥S﹣ABC中,SA=SB=SC,∠ABC=90°,AB>BC,E,F,G分别是AB,BC,CA的中点,记直线SE与SF所成的角为α,直线SG与平面SAB所成的角为β,平面SEG与平面SBC所成的锐二面角为γ,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/7f4085de-3093-4b9c-ad62-0b586a7181a0.png?resizew=191)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/7f4085de-3093-4b9c-ad62-0b586a7181a0.png?resizew=191)
A.α>γ>β | B.α>β>γ | C.γ>α>β | D.γ>β>α |
您最近一年使用:0次
2020-03-23更新
|
519次组卷
|
5卷引用:第一章+空间向量与立体几何(能力提升)-2020-2021学年高二数学单元测试定心卷(人教A版2019选择性必修第一册)
(已下线)第一章+空间向量与立体几何(能力提升)-2020-2021学年高二数学单元测试定心卷(人教A版2019选择性必修第一册)(已下线)第三章++空间向量与立体几何(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版选修2-1)(已下线)专题03 空间向量与立体几何的压轴题(一)-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)浙江省绍兴市上虞区2019-2020学年高二上学期期末数学试题浙江省绍兴市诸暨中学2020-2021学年高二(实验班)上学期10月阶段性考试数学试题
解题方法
3 . 如图,在矩形
中,
,
,M为
的中点,将
沿
翻折.在翻折过程中,当二面角
的平面角最大时,其正切值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1e88b36ff71fe69c07bade0f95f1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/74e0608e-cb6f-4ed6-bd37-2c50956a94c2.png?resizew=366)
您最近一年使用:0次
名校
4 . 在斜三棱柱(侧棱不垂直于底面)
中,侧面
底面
,底面
是边长为2的正三角形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/c2d634c1-9df0-467b-afae-843c50ae9b6f.png?resizew=196)
(1)求证:
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40154fd2f71e4621d800834f3656fd40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e2510e0b8cfdd1195b10c6725e6c1e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/c2d634c1-9df0-467b-afae-843c50ae9b6f.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88a95ce9472b498b7e34098be8fc977.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a824c242050a27d9da3bb3276ea99170.png)
您最近一年使用:0次
2020-03-22更新
|
989次组卷
|
6卷引用:北师大版(2019) 选修第一册 突围者 第三章 专项拓展训练1 空间直角坐标系的构建策略
北师大版(2019) 选修第一册 突围者 第三章 专项拓展训练1 空间直角坐标系的构建策略(已下线)专题8.7 立体几何中的向量方法(练)【理】-《2020年高考一轮复习讲练测》四川省成都市第七中学2023届高三二诊数学理科模拟试题陕西省渭南市2023届高三下学期教学质量检测(Ⅱ)理科数学试题陕西省渭南市2023届高三二模理科数学试题2020届甘肃省武威第六中学高三上学期第六次诊断考试数学(理)试题
名校
5 . 如图,四棱柱
中,
平面
,四边形
为平行四边形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/21bbad44-29bc-4d10-bfe4-f2e91e8acb57.png?resizew=198)
(1)若
,求证:
平面
;
(2)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.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/5178fcc1a040999563466fd69ed8b69a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9f9fcdffb61b5366a158ebd115cd3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/21bbad44-29bc-4d10-bfe4-f2e91e8acb57.png?resizew=198)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63270ba3d9029c4292bc8b1346208e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295640e886a3a29c5159a93fa287ee68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d027be176d18651cfd30f5492789ba.png)
您最近一年使用:0次
2020-03-18更新
|
351次组卷
|
4卷引用:山西省大同市第一中学2020届高三下学期2月命制数学(理)试题
山西省大同市第一中学2020届高三下学期2月命制数学(理)试题2020届湖南省怀化市麻阳一中高三下学期3月第七次月考数学(理)试题山东省2020年普通高等学校招生统一考试数学必刷卷(五)(已下线)专题19 立体几何综合-2020年高考数学母题题源全揭秘(浙江专版)
名校
解题方法
6 . 如图所示的几何体中,
是菱形,
,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/273d2f88-0c29-40af-8a0d-d97e38381567.png?resizew=137)
(1)求证:平面
平面
;
(2)求平面
与平面
构成的二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.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/ab2addb6ef9ede5e234f4b363f5dc0e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6cf26aa410592cbe676fce5faaa46b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/273d2f88-0c29-40af-8a0d-d97e38381567.png?resizew=137)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
您最近一年使用:0次
2020-03-17更新
|
457次组卷
|
4卷引用:理科数学-2020年高考押题预测卷01(新课标Ⅲ卷)《2020年高考押题预测卷》
(已下线)理科数学-2020年高考押题预测卷01(新课标Ⅲ卷)《2020年高考押题预测卷》2019届云南省曲靖市高中毕业生(第二次)复习统一检测理科数学试题2020届甘肃省天水市第一中学高三下学期诊断考试数学(理)试题甘肃省武威市古浪县第一中学2022-2023学年高二下学期期中数学试题
解题方法
7 . 在矩形
中,
,
为矩形
所在平面外一点,且
平面
,
,那么二面角
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be43133910b48169f27dea860c9d8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/3a64d03df326187159aaf98ee6757027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba0dd982b283611f4d01be499546af9.png)
A.30° | B.45° | C.60° | D.75° |
您最近一年使用:0次
2020-03-12更新
|
902次组卷
|
2卷引用:人教A版(2019) 必修第二册 必杀技 第8章 专题3空间线、面位置关系
名校
解题方法
8 . 已知平面
平面ABC,P、P在平面ABC的同侧,二面角
的平面角为钝角,Q到平面ABC的距离为
,
是边长为2的正三角形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/11852b5b-e2b9-4269-9642-933f73148f87.png?resizew=148)
(1)求证:面
平面PAB;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e026bcf0e93238163ec24e13864126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb56b883893ea2e422b5adfd7e50be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/11852b5b-e2b9-4269-9642-933f73148f87.png?resizew=148)
(1)求证:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040cc5f2f809a67331370dd0d3aa80d1.png)
您最近一年使用:0次
2020-03-10更新
|
440次组卷
|
3卷引用:安徽省合肥一六八中学2019-2020学年高二上学期期末考试数学(理)试题
安徽省合肥一六八中学2019-2020学年高二上学期期末考试数学(理)试题(已下线)基础套餐练09-【新题型】2020年新高考数学多选题与热点解答题组合练2019届安徽省合肥市一六八中学高三下学期高考适应性考试数学(理)试题
名校
9 . 如图所示,在棱台
中,
平面
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bce559fceb4731f8d4323410075a22b.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413215706357760/2413776841588736/STEM/f8c2bd6b-5a32-42d6-841b-16901ac5c2e6.png)
(1)求证:
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b84b67f5b6b0370156b7656f82130ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bce559fceb4731f8d4323410075a22b.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413215706357760/2413776841588736/STEM/f8c2bd6b-5a32-42d6-841b-16901ac5c2e6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0644b0dc7b8a116d43061f4e4147aa22.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe080a3f2a91171835bfc05cdb2917d.png)
您最近一年使用:0次
真题
解题方法
10 . 如图,在正三棱柱
中,
,
,由顶点
沿棱柱侧面经过棱
到顶点
的最短路线与棱
的交点记为
,求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/cfb8b741-63e4-4e3e-8c0d-5dafe7cd970f.png?resizew=157)
(1)三棱柱的侧面展开图的对角线长;
(2)该最短路线的长及
的值;
(3)平面
与平面
所成二面角(锐角)的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/cfb8b741-63e4-4e3e-8c0d-5dafe7cd970f.png?resizew=157)
(1)三棱柱的侧面展开图的对角线长;
(2)该最短路线的长及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06bf9ac357ff0f25ea23db6282bd9a3.png)
(3)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9921c943a00c97ef3a429c913538be12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-03-05更新
|
499次组卷
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6卷引用:人教A版(2019) 必修第二册 必杀技 模块综合测试
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