1 . 已知正方形ABCD的边长为1,沿对角线AC将△ADC折起,当AD与平面ABC所成的角最大值时,三棱锥D﹣ABC的体积等于( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-12-24更新
|
218次组卷
|
6卷引用:浙江省金华市浙江师大附属东阳花园外国语学校2020-2021学年高二上学期第一次质量检测数学试题
浙江省金华市浙江师大附属东阳花园外国语学校2020-2021学年高二上学期第一次质量检测数学试题(已下线)【新东方】杭州高二数学试卷241浙江省杭州市学军中学2019-2020学年高二上学期期中数学试题(已下线)2019年12月29日《每日一题》-每周一测(已下线)【新教材精创】11.4.1直线与平面垂直(第2课时)练习(1)6.6.2柱、锥、台的体积 课时练习2020-2021学年高一下学期数学北师大版(2019)必修第二册
2 . 如图,在四棱锥
中,平面
平面
,
,
是
的中点,
![](https://img.xkw.com/dksih/QBM/2017/11/24/1823950705262592/1826147410853888/STEM/961de5db9a9348f4938c129522b1a57d.png?resizew=257)
(1)求证:
平面
;
(2)求
与平面
所成的角的正切值;
(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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b36d3be6a201624b241e9b9ab00bda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6269b1c743250bbb638f80cc0ee34b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2017/11/24/1823950705262592/1826147410853888/STEM/961de5db9a9348f4938c129522b1a57d.png?resizew=257)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356f46276f25c78bab48c1f9447a2a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7a937699f989b685f285041434000.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479b251fdb01bae6d16abb7f2d694a7.png)
您最近一年使用:0次
2016-12-03更新
|
1142次组卷
|
4卷引用:2014-2015学年浙江省江山实验中学高二4月教学质检文科数学试卷
9-10高二下·河北邯郸·期末
名校
3 . 把正方形
沿对角线
折起,当以
四点为顶点的三棱锥体积最大时,直线
和平面
所成的角的大小为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2016-11-30更新
|
1291次组卷
|
9卷引用:2014-2015学年浙江省江山实验中学高二1月教学质检理科数学试卷
2014-2015学年浙江省江山实验中学高二1月教学质检理科数学试卷2014-2015学年浙江省江山实验中学高二1月教学质检文科数学试卷【全国百强校】河南省安阳市第一中学2018-2019学年高一上学期第二阶段考试数学试题四川省仁寿第二中学2020-2021学年高二10月月考数学试题(已下线)河北省邯郸市2009-2010学年度高二第二学期期末教学质量检测(已下线)2014-2015学年湖北襄州一中等四校高二上学期期中联考理科数学试卷河南省郑州市二中2015-2016学年高一上学期期末数学试题人教B版(2019) 选修第一册 北京名校同步练习册 第一章 空间向量与立体几何 1.2空间向量在立体几何中的应用 1.2.3直线与平面的夹角(已下线)第八章 本章综合--数学思想训练【第二练】“上好三节课,做好三套题“高中数学素养晋级之路
解题方法
4 . 在四棱锥
中,底面
是菱形,
底面
,
是
上一点,若
,则当
的面积为最小值时,直线
与平面
所成的角为( )
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a25cf6342437b653a4cf887b9e74336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9f0296c53918018745f4e3906e2dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
1206次组卷
|
3卷引用:2014-2015学年浙江省台州中学高二上学期第二次统练理科数学试卷
5 . 在正方体
中(如图),已知点
在直线
上运动,则下列四个命题:
①三棱锥
的体积不变;
②直线
与平面
所成的角的大小不变;
③二面角
的大小不变;
④
是平面
上到点
和
距离相等的点,则
点的轨迹是直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
其中真命题的编号是__________ .(写出所有真命题的编号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad99ef5e70de37345c708b758d545f.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
③二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67094912ebf6dd7b27b835af55df4826.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
其中真命题的编号是
您最近一年使用:0次
2017-02-23更新
|
1089次组卷
|
8卷引用:2016-2017学年浙江省名校协作体高二下学期考试数学试卷
2016-2017学年浙江省名校协作体高二下学期考试数学试卷浙江省杭州市名校协作体2016-2017学年高二下学期月考数学试题安徽省芜湖市第一中学2020-2021学年高二上学期10月第二轮月考理科数学试题河北省衡水中学2016-2017学年高一下学期期中考试数学(理)试题黑龙江省佳木斯市第一中学2016-2017学年高一下学期期末考试数学试题(已下线)微专题13 轻松搞定立体几何的轨迹问题(已下线)结业测试卷(范围:第六、七、八章)(提高篇)-【寒假预科讲义】(人教A版2019必修第二册)(已下线)重难点专题11 轻松搞定立体几何的轨迹问题-【帮课堂】(苏教版2019必修第二册)
名校
解题方法
6 . 如图,四棱锥
中,底面
为矩形,
平面
,设
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/11/8/1573132249620480/1573132255846400/STEM/732156f6-bbde-4111-8d4c-e88c1df70a79.png?resizew=311)
(1)证明:
平面
;
(2)设异面直线
与
所成角为45°,
,求三棱锥
的体积.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2016/11/8/1573132249620480/1573132255846400/STEM/732156f6-bbde-4111-8d4c-e88c1df70a79.png?resizew=311)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)设异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1412048bf1422752f89049f5521095a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b565e518d475a50358fedff2f0bb8dec.png)
您最近一年使用:0次
2016-12-05更新
|
906次组卷
|
7卷引用:浙江省台州市三梅中学2020-2021学年高二上学期10月第一次教学检测数学试题
名校
7 . 如图,已知三棱台
中,平面
平面
,且侧面
为等腰梯形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/00afc5ec-2014-4516-9881-07b1f051ffa3.png?resizew=192)
(1)求证:
;
(2)求
与平面
所成角的正弦值.
![](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/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a683d9fee9806fdfae113c7529a1252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb02976be807beda7ac2ebaec4ca69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a71fda65a8dad5f594ee176f48bdc8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/00afc5ec-2014-4516-9881-07b1f051ffa3.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a90cde96ac04fd1938965bbaab6b0e8.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
8 . 如图,正四面体
的顶点
在平面
内,且直线
与平面
所成角为
,顶点
在平面
上的射影为点
,当顶点
与点
的距离最大时,直线
与平面
所成角的正弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1006d62fa5723dc36286b8f5494f993e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2017/9/1/1764894541381632/1765333116534784/STEM/9c69bb1e21254eea891fa831a990f779.png?resizew=249)
您最近一年使用:0次
2017-09-02更新
|
534次组卷
|
2卷引用:浙江省杭州高级中学 2017 届高三2月高考模拟考试试题
名校
9 . 如图,
中,
是
的中点,
,将
沿
折起,使
点到达
点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/11/c092e2c2-468a-45f9-bbe4-23ab1b863366.png?resizew=167)
(1)求证:
平面
;
(2)当三棱锥
的体积最大时,试问在线段
上是否存在一点
,使
与平面
所成的角的正弦值为
?若存在,求出点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2093a66a26a5f10ae52cfaa0eee776e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e195f36d43128197ea62c7f53ed57197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/11/c092e2c2-468a-45f9-bbe4-23ab1b863366.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d8176fd02498ba77b24c65b9a96ba0.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a6a4ec5b60f68983e4b76722c015f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd77faaa1eaf374b6b23c6f9a4ac3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aca20ae3f31fa435612625edd5b34ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2017-04-15更新
|
457次组卷
|
5卷引用:2016届浙江省宁波市“十校”高三联考文科数学试卷
2016届浙江省宁波市“十校”高三联考文科数学试卷湖北省襄阳市第五中学2021-2022学年高二上学期9月月考数学试题2016届宁夏石嘴山三中高三下四模理科数学试卷2017届吉林省梅河口市第五中学高三一模数学(理)试卷(已下线)考点41 立体几何的向量方法-空间角问题(考点专练)-备战2021年新高考数学一轮复习考点微专题
10 . 在正三棱柱
中,各棱长均相等,
与
的交点为
,则直线
与平面
所成角的大小是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次