名校
解题方法
1 . 已知三棱锥
中,
,
.若平面
分别与棱
相交于点
且
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/5f571930-b2a8-454a-9224-fdb37f1262bc.png?resizew=172)
求证:(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413c799e8fb983e6274ec4be9ff6c431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04ac462c8801ab6de7d64e38d95efe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93a5ea2c4dab70518bed4b3f2989f47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/5f571930-b2a8-454a-9224-fdb37f1262bc.png?resizew=172)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c6642a4c35cab16287c99bc9b07472.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a213c602df5aa7fed9bfd18f0b475aea.png)
您最近一年使用:0次
2019-05-15更新
|
4536次组卷
|
6卷引用:江苏省泰州中学2019届高三3月月考数学试题
江苏省泰州中学2019届高三3月月考数学试题【全国百强校】江苏省扬州中学2019届高三4月考试数学试题新疆维吾尔自治区乌鲁木齐市第四中学2018-2019学年高一下学期期末数学试题黑龙江省牡丹江市第一高级中学2018-2019学年高一下学期期末数学试题四川省广安市广安中学2019-2020学年高二9月月考(文)数学试题(已下线)专题01 平行、垂直问题的证明(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖
名校
解题方法
2 . 如图,在四棱锥
中,
平面
,底面
是菱形.
(1)求证:
;
(2)若平面
与平面
的交线为
,求证:
.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c70a73fc2e59b8bdf802b0072243ab0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/83298554-72b0-4162-bd20-c9d903e491f8.png?resizew=159)
您最近一年使用:0次
2019-05-08更新
|
510次组卷
|
2卷引用:江苏省江阴市第一中学2018-2019学年高一下学期期中考试数学试题
12-13高三上·河北保定·期末
名校
解题方法
3 . 如图,在正三棱柱
中,
是
的中点,
是线段
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/5ba9f6a1-cd82-417e-9c4e-c99b879a70dc.png?resizew=123)
(1)若
,求证:
;
(2)求二面角
的余弦值;
(3)若直线
与平面
所成角的大小为
,求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958217185cddb12466c9760248a4ca01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094e639c2b31dc54b1b3e6456e77843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc65c549059934e69355d8ecc245da57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7895c919da3819abea641a35524afcdf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/5ba9f6a1-cd82-417e-9c4e-c99b879a70dc.png?resizew=123)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da022b26812ea653c7ed00cb1fb448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c17067fa0e18231e358545529dbee69.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f566da2725ef9999fccac9e27fb4ea.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ecff583dd5f216b28e0df718943ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4891e5861897266806a8c113be5e8ab9.png)
您最近一年使用:0次
名校
4 . 在四棱锥
中,平面
平面
,底面
为矩形,
,
,
,
、
分别为线段
、
上一点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/bf50abb3-4d68-451c-a41d-14c579f5d2ad.png?resizew=187)
(1)证明:
;
(2)证明:
平面
,并求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e05d8681a679bd31922e62480f69d55.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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251387023641ec1af5b58801666ecda2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bac9bf01e282af11adc5b45044a499b.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3505caf94539d51c4edba53a78ad0d3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/bf50abb3-4d68-451c-a41d-14c579f5d2ad.png?resizew=187)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ab924e3692515bd8be4c36472a959a.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16835e3f230ba3f543b6804e445e283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2990ef24039c6be7643cb582062503a.png)
您最近一年使用:0次
2019-03-28更新
|
1363次组卷
|
7卷引用:【市级联考】贵州省黔东南州2019届高三下学期第一次模拟考试数学(文)试题
名校
5 . 如图,四棱锥
的底面为正方形,
底面
,则下列结论中不正确的是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8e07666a-6800-4def-960d-4cb990d7498f.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8e07666a-6800-4def-960d-4cb990d7498f.png?resizew=170)
A.![]() |
B.![]() ![]() |
C.平面![]() ![]() |
D.![]() ![]() ![]() ![]() |
您最近一年使用:0次
2019-02-28更新
|
1007次组卷
|
4卷引用:【全国百强校】陕西省西安中学2018-2019学年高一上学期期末考试数学试题
名校
6 . 如图,在直四棱柱ABCD-A1B1C1D1中,底面是边长为
的正方形,AA1=3,点E在棱B1B上运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/b9a2dd49-3a93-413b-9ae9-d6e32cfb4bc0.png?resizew=160)
(1)证明:AC⊥D1E;
(2)若三棱锥B1-A1D1E的体积为
时,求异面直线AD,D1E所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/b9a2dd49-3a93-413b-9ae9-d6e32cfb4bc0.png?resizew=160)
(1)证明:AC⊥D1E;
(2)若三棱锥B1-A1D1E的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0e7bfbd56fe73dfe04c04da749d942.png)
您最近一年使用:0次
2019-02-08更新
|
341次组卷
|
4卷引用:2015届湖北省武汉市武昌区高三元月调研考试文科数学试卷
2015届湖北省武汉市武昌区高三元月调研考试文科数学试卷(已下线)章末检测2(课后作业)-2018-2019版数学创新设计课堂讲义同步系列(人教A版必修2)山东省东营市广饶县第一中学三校区2022-2023学年高二9月月考数学试题(已下线)第一章 空间向量与立体几何(易错必刷40题14种题型专项训练)-【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)
名校
解题方法
7 . 如图,在四棱锥
中,
,
,
,
,
分别是
和
的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/517972d2-397c-4d5f-927b-d9decdc43676.png?resizew=172)
(1)证明:
;
(2)证明:平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502a46021ff0bd64fc4cd3bad7d8a826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1161e0345b3646c71365430dccbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/517972d2-397c-4d5f-927b-d9decdc43676.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c583493109d50c9e4634c05e9042a9f.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d103e9cd501065d24ab94b5fd6cb37.png)
您最近一年使用:0次
2019-02-05更新
|
1299次组卷
|
6卷引用:【校级联考】广西贺州市非示范性高中2018-2019学年高一上学期期末考试数学试题
9-10高一下·云南昆明·期末
名校
8 . 如图,在正方体
中,M是
的中点,O是底面ABCD的中心,P是
上的任意点,则直线BM与OP所成的角为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b77a03d567bafae72d7b14e69bace81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc689a0bf91e6384ca0bd3fb3fbfa0ac.png)
您最近一年使用:0次
2019-01-30更新
|
1110次组卷
|
10卷引用:09-10学年昆明三中高一下学期期末数学试卷
(已下线)09-10学年昆明三中高一下学期期末数学试卷(已下线)2010年吉林一中高一下学期期末考试数学卷(已下线)2011年四川省绵阳中学高二下学期第一次月考数学试卷(已下线)2010-2011年四川省绵阳中学高二下学期第一次月考数学试卷北京市十一学校2016-2017学年高二上学期期中考试数学(理)试题(已下线)第十一课时 课后 1.4.2.2 夹角问题(已下线)第3讲 用空间向量研究距离、夹角问题-2021-2022学年高二数学上学期高频考点专题突破(人教A版2019选择性必修第一册)山东省聊城市第二中学2022-2023学年高二上学期开学考试数学试题上海市嘉定区第一中学2021-2022学年高二上学期期末数学试题(已下线)1.4.2 用空间向量研究距离、夹角问题【第一课】
名校
9 . 如图,在三棱锥
中,
,
,
,
,
,
分别为线段
,
上的点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28597da489dc639750523c83fbc11c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e99aae9fa3f0cd6405461b8db163e8.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aabee6b0c633ffd42f01af2e1fb8a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75dc7cef548ba1fda2b082733baae52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb0f9de2f087af7ef18ee9184d88b51.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69fbd5a9df4c0210604cf1ae2fa7e0c.png)
您最近一年使用:0次
2019-01-23更新
|
508次组卷
|
5卷引用:【市级联考】甘肃省张掖市2019届高三上学期第一次联考数学(理)试题
名校
10 . 如图,在梯形
中,
,
,
,现将
沿
翻折成直二面角
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/381bc715-77fe-4609-938a-ada15fa13cc5.png?resizew=468)
(Ⅰ)证明:
;
(Ⅱ)若异面直线
与
所成角的余弦值为
,求二面角
余弦值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de3595bb7c79503fabd75d99196ccb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbced129627233661d88e9663a9e13c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/381bc715-77fe-4609-938a-ada15fa13cc5.png?resizew=468)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec82279b14a119057fdd78b85d63e669.png)
(Ⅱ)若异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
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2019-01-22更新
|
3818次组卷
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4卷引用:【市级联考】福建省宁德市 2019届高三第一学期期末质量检测数学理科试题