解题方法
1 . 如图,在直三棱柱
中,底面
是等边三角形,
是
的中点,且异面直线
与
所成角的正切值为
.
![](https://img.xkw.com/dksih/QBM/2021/5/7/2715779483254784/2717957827895296/STEM/a00e4b1d-32e4-495f-ac6e-5f5f28c3ee43.png)
(1)证明:
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/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://img.xkw.com/dksih/QBM/2021/5/7/2715779483254784/2717957827895296/STEM/a00e4b1d-32e4-495f-ac6e-5f5f28c3ee43.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68586226c716b674f7bee76a5524085.png)
您最近一年使用:0次
解题方法
2 . 四面体
中,
,且
与
所成角为
,则该四面体的外接球表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2219cc8a0a9969cea778987f7084081a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 如图,已知直三棱柱
的所有棱长均为3,
,
,
,
分别在棱
,
,
,
上,且
,
是
的中点,
是
的中点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/9d851d75-cf64-4426-8830-01abccd3958a.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.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/fefc9a5109f30683f9c747736cb97274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](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/8b8a295e9474afc5e3628832bd3724f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/9d851d75-cf64-4426-8830-01abccd3958a.png?resizew=139)
A.![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.过点![]() ![]() ![]() |
您最近一年使用:0次
2021-04-12更新
|
1264次组卷
|
3卷引用:2021年全国新课改地区高三第三次质量监测数学试题
2021年全国新课改地区高三第三次质量监测数学试题山东省百所名校2021届高三下学期4月份联考数学试题(已下线)第12题 多选题中的立体几何综合问题-2021年高考数学真题逐题揭秘与以例及类(新高考全国Ⅰ卷)
名校
4 . 正方体
的棱长为
分别为
的中点.则( )
![](https://img.xkw.com/dksih/QBM/2021/3/24/2685006325235712/2686742329204736/STEM/409fdc88-af40-4aa4-a097-c2aa91bd3c63.png?resizew=274)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46f43920d092fa43fc2e588404d89c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd21f1df5df752343fd02502854eacb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473ce0e22c4edc6ef768e0c12f59e483.png)
![](https://img.xkw.com/dksih/QBM/2021/3/24/2685006325235712/2686742329204736/STEM/409fdc88-af40-4aa4-a097-c2aa91bd3c63.png?resizew=274)
A.直线![]() |
B.直线![]() |
C.平面AEF截正方体所得的截面面积为![]() |
D.点![]() |
您最近一年使用:0次
2021-03-27更新
|
2822次组卷
|
15卷引用:湖南省长沙市雅礼中学2021届高三下学期高考热身训练数学试题
湖南省长沙市雅礼中学2021届高三下学期高考热身训练数学试题湖北省十一校2021届高三下学期3月第二次联考数学试题(已下线)2021年高考数学押题预测卷(新高考卷)01江苏省南京师范大学附属中学2020-2021学年高一下学期期末数学试题广东省肇庆市封开县渔涝中学2020-2021学年高一下学期期末数学试题浙江省湖州市安吉县2020-2021学年高一下学期期末数学试题浙江省金衢六校联盟2021-2022学年高二上学期期末联考数学试题山东省济南·德州七校联考2021-2022学年高二上学期12月检测数学试题福建省福州市四校联盟2021-2022学年高一下学期期末联考数学试题湖南省长沙市明德中学2022-2023学年高二上学期入学考试数学试题广东省协和、华侨、增城中学2022-2023学年高二上学期期末数学试题(已下线)新高考卷05浙江省杭师附2022-2023学年高二上学期期末数学试题广东省广州市协和中学等三校2022-2023学年高二上学期期末联考数学试题(已下线)河南省信阳高级中学2023-2024学年高三上学期8月月考数学试题
解题方法
5 . 已知长方体
中,
,
是
的中点,且异面直线
与
所成的角是
.则在此长方体的表面上,从
到
的路径中,最短路径的长度为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0041488020a3e19377b18a70fbf82e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2020·全国·模拟预测
解题方法
6 . 如图,已知四边形
为圆柱的轴截面,
为
的中点,
为母线
的中点,异面直线
与
所成角的余弦值为
,
,则该圆柱的体积为( ).
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634692055285760/2635806573395968/STEM/0c7daf56fdb14c68a92052345648c07c.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634692055285760/2635806573395968/STEM/0c7daf56fdb14c68a92052345648c07c.png?resizew=177)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020·全国·模拟预测
7 . 《九章算术》商功章中记载的几何体“堑堵”,是指底面为直角三角形的直棱柱,现有堑堵
,其中
,
,且异面直线
与
所成角的正弦值为
,则该堑堵的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2020·全国·模拟预测
8 . 如图,已知四边形
为圆柱的轴截面,
为
的中点,
为母线
的中点,且异面直线
与
所成角的余弦值为
,
,则该圆柱的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634687631802368/2635275146248192/STEM/2eedbb9ccaa24817a46639e2adb0eef3.png?resizew=262)
您最近一年使用:0次
2020·全国·模拟预测
9 . 已知正方体
的所有顶点均在体积为
的球
上,动点
在底面
上运动,且满足直线
与直线
所成角的正弦值为
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f479c521ce8a3e0013347d39a7d16e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020·全国·模拟预测
10 . 已知正方体
的所有顶点均在体积为
的球
上,则该正方体的棱长为________ ,若动点
在四边形
内运动,且满足直线
与直线
所成角的正弦值为
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c8a4b3944cacd4a6f3663326e8ad92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
您最近一年使用:0次