解题方法
1 . 如图,在直棱柱
中,
,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572677414502400/1572677420670976/STEM/b44fdad5172144eab767f7ae3a74f793.png?resizew=288)
(1)求证:
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f8446dff23dc04b2a39d9080ea52ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a449fd2e042dd7868ed7076aa12472.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572677414502400/1572677420670976/STEM/b44fdad5172144eab767f7ae3a74f793.png?resizew=288)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417104247ce266ae42c3a9860f387272.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ae77736a8c5cf8b170a39ef3bfc4ac.png)
您最近一年使用:0次
2016-12-04更新
|
340次组卷
|
3卷引用:2015-2016学年北京市西城区高二上学期期末考试理科数学试卷
2015-2016学年北京市西城区高二上学期期末考试理科数学试卷2016-2017学年河南省平顶山市高二上学期期末调研考试数学(理)试卷(已下线)河南省平顶山市2016-2017学年高二上学期期末调研考试理数试题
解题方法
2 . 如图,三棱柱
的侧面
是边长为
的正方形,侧面
侧面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/981c4801-a21e-4a76-9961-056d43e644c5.png?resizew=340)
(Ⅰ)求证:
∥平面
;
(Ⅱ)求证:
平面
;
(Ⅲ)在线段
上是否存在一点
,使二面角
为
,若存在,求
的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6480f384476190883f06c0289c7519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ca47585273d02911e4eb87f01c8354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d498a0467ff3c577a7ed175d7bffd885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9562e0964e4e9140a0e06a75ae8c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/981c4801-a21e-4a76-9961-056d43e644c5.png?resizew=340)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46a7e819a5ed0b789f1f06bb0076422.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ae2b7a11660208b3075da0be25b21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6480f384476190883f06c0289c7519.png)
(Ⅲ)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbbf91d6bac18e969cbb0015a16c9e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,
为等边三角形,平面
平面
,
,
,
,
,
为
的中点.
)求证:
.
(
)求二面角
的余弦值.
(
)若
平面
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e409a3a0db612b3fbe8f26bc40e83e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b12aa9d4f934868c3e4f51f73e7c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f85543243052612fb75694d6978bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9af0f7538dc8fc5683ef4959a11c53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd4d3ed0d4f1a2296de6a91445376f2.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3541d43bfeba7f5a5cf0112b93932020.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2016-12-03更新
|
3540次组卷
|
12卷引用:2015年全国普通高等学校招生统一考试理科数学(北京卷)
2015年全国普通高等学校招生统一考试理科数学(北京卷)北京市十一学校2016-2017学年高二上学期期中考试数学(理)试题北京西城第十四中学2018届高三上学期期中考试数学(理)试题北京西城14中2018届高三上学期期中真题卷数学试题北京市北京师范大学第二附属中学2022届高三上学期期中考试数学试题北京十年真题专题07立体几何与空间向量专题09立体几何与空间向量(第二部分)2016届宁夏育才中学高三上学期第四次月考理科数学试卷2015-2016学年山西省怀仁一中高二下第一次月考数学试卷第二章 高考链接(二)北京名校2023届高三二轮复习 专题四 立体几何 第3讲 立体几何的综合应用(已下线)专题23 立体几何解答题(理科)-2
4 . 在如图所示的几何体中, 四边形
是正方形,
底面
.
,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/868bd94f-4e58-433a-9bc1-bf7ec4b1f547.png?resizew=187)
(1)若
与
交于点
,求证:
平面
;
(2)求证:
平面
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6020b78ff385667b30088ecadeadd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bbd04b75eb3db55fc13d78e7c30188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/868bd94f-4e58-433a-9bc1-bf7ec4b1f547.png?resizew=187)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572013855776768/1572013861412864/STEM/07c0af48afcf44848f705cd74c99d5a7.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572013855776768/1572013861412864/STEM/9b6965ed831146f39d5dff72d91536be.png?resizew=37)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572013855776768/1572013861412864/STEM/11d05c27fb834516871436f4f3ed2763.png?resizew=43)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572013855776768/1572013861412864/STEM/0e4c108b955d4c54b98de5c022da93cb.png?resizew=37)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fab6a076ed5e7a28751ac94d8a54e48.png)
您最近一年使用:0次
2016-12-03更新
|
3351次组卷
|
2卷引用:2015届北京市大兴区高三上学期期末考试理科数学试卷
解题方法
5 . 如图,在四棱锥
中,底面
是边长为
的正方形,侧面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
底面
,且
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571768777728000/1571768783634432/STEM/c665b1f0f72c4eaa962878ce5b5a6a24.png?resizew=250)
(1)求证:
平面
;
(2)求证:面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
平面
;
(3)在线段
上是否存在点
,使得二面角
的余弦值为
?说明理由.
![](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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b7201f9eb7e7c10042c096e0c9f15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571768777728000/1571768783634432/STEM/c665b1f0f72c4eaa962878ce5b5a6a24.png?resizew=250)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcb31811973c8a869bffc4902923ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
2016-12-03更新
|
983次组卷
|
4卷引用:2016-2017北京西城14中高二上期中数学试题
13-14高三·北京西城·期末
6 . 如下图,在四棱柱
中,底面
和侧面
都
是矩形,
是
的中点,
,
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb7548af8fc8192e7fd5d1c728681a8.png)
(2)求证:
平面
;
(3)若平面
与平面
所成的锐二面角的大小为
,求线段
的长度.![](https://img.xkw.com/dksih/QBM/2014/4/24/1571654083198976/1571654089015296/STEM/3426770ec8dd485a92c3be89f6ccc3d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
是矩形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5c67745fcf0a5978e01722cb3e07a1.png)
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571654083198976/1571654089015296/STEM/bfe6a75e57c54f939e03e4a0706d7a7d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb7548af8fc8192e7fd5d1c728681a8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504a36c231b8e80724d01649e7c0944f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
(3)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdab625e32e38d1c72c901cece0e147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571654083198976/1571654089015296/STEM/3426770ec8dd485a92c3be89f6ccc3d7.png)
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571654083198976/1571654089015296/STEM/bfa1e661d2fd4e7d894765caefe65f72.png)
您最近一年使用:0次
7 . 在四棱锥
中,
平面
,
是正三角形,
与
的交点
恰好是
中点,又
,
,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/df441c0d-06ca-457b-8cf1-1d736b4f553d.png?resizew=195)
(1)求证:
;
(2)求证:
平面
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a4950a6e4202efd609507964af238b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b59aa9d816a1379f2f2a7b9ea43efe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25db6044d172b2dcdc276ca1c0b1222.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/df441c0d-06ca-457b-8cf1-1d736b4f553d.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
您最近一年使用:0次
2016-12-02更新
|
2419次组卷
|
4卷引用:北京五十七中2020--2021学年高二上学期数学期中考试试题
北京五十七中2020--2021学年高二上学期数学期中考试试题(已下线)2014届宁夏银川一中高三上学期第五次月考理科数学试卷2015届天津市南开中学高三第三次月考文科数学试卷2015-2016学年江苏启东中学高二上学期期中理科数学试卷
2011·江西·一模
名校
8 . 已知四棱锥
中
平面
,且
,底面为直角梯形, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b31a77c7dfcec8a7b27afae5cd6d0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedfff40d31e4f98f223fd5834a57866.png)
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2013/3/23/1571158969155584/1571158974881792/STEM/a462c830-67cd-47e0-b372-e2eb8181f8bf.png?resizew=190)
(1)求证:
// 平面
;
(2)求截面
与底面
所成二面角的大小;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/72f9d7c0897decece12409432fc1191a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b31a77c7dfcec8a7b27afae5cd6d0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedfff40d31e4f98f223fd5834a57866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211a44ffb09c7413dac58e9cea70fd9.png)
![](https://img.xkw.com/dksih/QBM/2013/3/23/1571158969155584/1571158974881792/STEM/a462c830-67cd-47e0-b372-e2eb8181f8bf.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
(2)求截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101d5eb54d3f629a378bfd5324f554dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101d5eb54d3f629a378bfd5324f554dd.png)
您最近一年使用:0次
2016-12-02更新
|
1264次组卷
|
4卷引用:北京市西城区外国语学校2021-2022学年高二上学期开学考试数学试题
北京市西城区外国语学校2021-2022学年高二上学期开学考试数学试题(已下线)2011届江西省八所重点中学高三联合模拟考试数学理卷(已下线)2013届辽宁省沈阳市第二十中学高三高考领航考试(一)理科数学试卷天津市南开区南大奥宇培训学校2020-2021学年高二上学期第一次月考数学试题
11-12高二·全国·课后作业
解题方法
9 . 已知棱长为1的正方体
,
分别是
、
的中点.
(1)求证:
共面;
(2)求点
到平面
的距离;
(3)求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d8629cf9b0502b3f4835136c95d41e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
您最近一年使用:0次
10 . 三棱柱
中,侧棱与底面垂直,
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2012/6/29/1570905304064000/1570905309675520/STEM/f59841d2-663b-4245-968a-44e1f127ac09.png)
(1)求证:
平面
;
(2)求证:
平面
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c7d01c3618d579121d95d41a63c565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b121878eba809201b0cfa27fc0e05d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c2c469e50b231ff7667fbc96c19ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b5812a62bf78ae7821f36ba44c5eec.png)
![](https://img.xkw.com/dksih/QBM/2012/6/29/1570905304064000/1570905309675520/STEM/f59841d2-663b-4245-968a-44e1f127ac09.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a02695cd69ff39af9e1423ec5fdb1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16dd27701a0a9849b58d39ae10623763.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d996d44e08e382b2c85e0a1707075aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e310044ff086da718b99ad44536f224.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81aa921a0e20db87ad16ebc3e2a9d221.png)
您最近一年使用:0次
2016-12-01更新
|
634次组卷
|
10卷引用:北京五十七中2017-2018学年高二上学期期中考试数学试题
北京五十七中2017-2018学年高二上学期期中考试数学试题(已下线)2012届河南省郑州盛同学校高三上学期第一次月考文科数学(已下线)2012届山东省高考模拟冲刺卷文科数学(三)(已下线)2012届山东省鄄城一中高三下学期模拟冲刺考试文科数学试卷(已下线)2014届山西省曲沃中学高三上学期期中考试文科数学试卷(已下线)2013-2014学年江西宜春上高二中高二第六次月考文数学卷2015-2016学年江西省宜春市奉新一中高二上期末文科数学试卷2017届山西省怀仁县第一中学高三上学期期末考试数学(理)试卷2016-2017学年河南省豫南六市高二下学期第一次联考数学(理)试卷(已下线)专题07 空间向量与立体几何-【备战高考】2021年高三数学高考复习刷题宝典(解答题专练)