名校
1 . 如图,在三棱柱
中,
,
,侧面
是正方形,
为
的中点,二面角
的大小是
.
平面
;
(2)线段
上是否存在一个点
,使直线
与平面
所成角的正弦值为
.若存在,求出
的长;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/c5ae8a050d7159d4296c2409e5bc0bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea67423ce6963c0972867306169f17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589024e3c65475d8b5b00ebf373e4965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4df730e937fb61b85054d316848b304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2024-05-27更新
|
673次组卷
|
2卷引用:2024届内蒙古呼和浩特市高三第二次质量数据监测理数试卷
解题方法
2 . 已知菱形
满足
,将
沿
折起,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/3ab713a5-14a0-42e3-89b5-af5c641c2a12.png?resizew=296)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64740d3f233d7f44b54b0c462ee1eb72.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/b88b078e34893ca0e9841070b29ee432.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/3ab713a5-14a0-42e3-89b5-af5c641c2a12.png?resizew=296)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0fbd88fdb064072eedd136e9cb41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
解题方法
3 . 如图,在直三棱柱
中,
,
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/c3e8b89c-c780-4365-8845-93591e46cc82.png?resizew=208)
(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/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4622aff92fac94916af14f0e913e021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/c3e8b89c-c780-4365-8845-93591e46cc82.png?resizew=208)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231673dd67ab79d3c5da73904ceade1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46f9f7d220d3b871911a376104f0d6e.png)
您最近一年使用:0次
解题方法
4 . 如图,在三棱柱
中,侧棱
底面
,
,
,D、E分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973577669443584/2975031634714624/STEM/c1e81348130a4464bd953185f427056a.png?resizew=142)
(1)证明:平面
平面
;
(2)已知
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecbfc700f5b996ac9b689e6dfa48a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d97e150793ad48c641db0cc74aaa341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbe2ffa2eaf64721abf61e5545cf1a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973577669443584/2975031634714624/STEM/c1e81348130a4464bd953185f427056a.png?resizew=142)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a56b5b23a554be5bf8dc3d065fdb6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a67d8576417f761dd5f583ad3a1555a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
名校
5 . 如图,三棱柱
中,
侧面
,已知
,
,
,点E是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3272e813-3e04-4b14-90b6-4c14db3d56c7.png?resizew=162)
(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/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f60b72ee0127c4c20a448575f219e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7932b50fa677dfcd8e3b5061a90c133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3272e813-3e04-4b14-90b6-4c14db3d56c7.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80445f463fa0bdc97c0ba062d03ce342.png)
您最近一年使用:0次
2021-03-22更新
|
1306次组卷
|
4卷引用:内蒙古呼和浩特市2021届高考第一次质量普查调研考试(一模)理科数学试题
名校
解题方法
6 . 如图,三棱柱
中,D是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/03656881-a632-4480-aef3-10b67aaffd28.png?resizew=193)
(1)证明:
面
;
(2)若△
是边长为2的正三角形,且
,
,平面
平面
.求平面
与侧面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/03656881-a632-4480-aef3-10b67aaffd28.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)若△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad91719bd5fdc1b2d3d5298f2f44cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd426c9273efec5173db056d1d099f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
2020-08-17更新
|
1717次组卷
|
7卷引用:内蒙古呼和浩特市2020届高三第二次质量普查调研考试(二模)数学(理)试题
7 . 在如图所示的几何体中,四边形
是菱形,
是矩形,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/16bed2b1-fe88-4b8d-bf98-3a74f71f42d6.png?resizew=222)
(1)求证:平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
(2)在线段
上是否存在点
,使二面角
的大小为
?若存在,求出
的长度;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9621a5bf82a3af202b3cf6c197f431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394541049e3a8d9c2f6f55cd4b146fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6383ebd3154b07853d18959c5c8495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8fb795255d80c8198c5a8085cf0bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15c0455b365fa5d12e8b726e319da2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61588617d22abd00af4ca489bb3a8787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/16bed2b1-fe88-4b8d-bf98-3a74f71f42d6.png?resizew=222)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a76f50bd52fb5a4e5fde1dab088b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2d1b8208a885e711ae113087cbc6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdb03e56f46ea13a39336d469979d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a946fb26d837cd9255f41531f2b27e4d.png)
您最近一年使用:0次
2019-05-06更新
|
835次组卷
|
3卷引用:【市级联考】内蒙古呼和浩特市2019年高三第二次质量普查调研考试理科数学试题
【市级联考】内蒙古呼和浩特市2019年高三第二次质量普查调研考试理科数学试题2020届四川省泸县第四中学高三三诊模拟考试数学(理)试题(已下线)艺体生一轮复习 第七章 立体几何 第36讲 空间向量在立体几何中的应用【练】
名校
8 . 如图,在四棱锥P-ABCD中,PA⊥底面ABCD,AD⊥AB,AB∥DC,AD=DC=AP=2,AB=1,点E为棱PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/bd1fce16-719f-493f-ac50-f2f063531e97.png?resizew=186)
(Ⅰ)证明:BE⊥DC;
(Ⅱ)求直线BE与平面PBD所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/bd1fce16-719f-493f-ac50-f2f063531e97.png?resizew=186)
(Ⅰ)证明:BE⊥DC;
(Ⅱ)求直线BE与平面PBD所成角的正弦值.
您最近一年使用:0次
2018-11-05更新
|
988次组卷
|
11卷引用:内蒙古呼和浩特市第二中学2023届高三下学期2月份一模考前模拟理科数学试题
内蒙古呼和浩特市第二中学2023届高三下学期2月份一模考前模拟理科数学试题陕西省西安中学2021届高三下学期第七次模拟考试理科数学试题2015届内蒙古巴彦淖尔市第一中学高三上学期期中考试理科数学试卷【校级联考】四川省眉山一中办学共同体2018-2019学年高二上学期半期考试数学(理)试卷【全国百强校】浙江省杭州第十四中学2019届高三8月月考数学试题山东省济宁市曲阜市第一中学2020-2021学年高二阶段性检测(9月月考)数学试题陕西省安康市2022-2023学年高二上学期期中理科数学试题新疆乌鲁木齐市第四中学2022-2023学年高二上学期期中阶段诊断测试数学试题(已下线)高一下学期期末真题精选(压轴60题20个考点专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)贵州省铜仁市江口中学2022-2023学年高二上学期9月月考数学试题(已下线)期中真题必刷压轴60题(18个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
9 . 一个多面体如图,
是边长为
的正方形,
平面
.
![](https://img.xkw.com/dksih/QBM/2018/4/3/1916331992047616/1917802582237184/STEM/32992c3dbf37422f8140575b4936e6b6.png?resizew=136)
(1)若
,设
与
的交点为
,求证:
平面
;
(2)求二面
角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ea937e9e50c15cc1bab0b2f2785942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4127695b4947e239b8461dfca3fbe266.png)
![](https://img.xkw.com/dksih/QBM/2018/4/3/1916331992047616/1917802582237184/STEM/32992c3dbf37422f8140575b4936e6b6.png?resizew=136)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368ecbaf8201748ed9f15368bc15ff8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de7ea432599108b34a0ccaa0f2c75e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
(2)求二面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40df8e474334faad849abb7cc6bbd12c.png)
您最近一年使用:0次
10 . 如图,矩形
中,
,
,
在
边上,且
,将
沿
折到
的位置,使得平面
平面
.
(Ⅰ)求证:
;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68696b781af2609327222d22cb7bab3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b348d4333ecdfc3e3b1ba16dc312550d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ced76e1ee551955a877688618b1f4ad.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5a101bb92bd721e35acc7023154b44.png)
![](https://img.xkw.com/dksih/QBM/2017/4/18/1668561570709504/1668648730017792/STEM/cd7d6f1167504c9eb741ff615f56b857.png?resizew=149)
您最近一年使用:0次
2017-04-18更新
|
2056次组卷
|
5卷引用:2020届内蒙古呼和浩特市高三第一次质量普查调研考试理科数学