名校
1 . 如图,将斜边长为
的等腰直角
沿斜边
上的高
折成直二面角
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/e5f424df-b202-48d3-91b5-9644ed407202.png?resizew=287)
(1)求二面角
的余弦值;
(2)
为线段
上一动点,当直线
与平面
所成的角最大时,求三棱锥
外接球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29cc627d76412c236aac6b29fa0fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/e5f424df-b202-48d3-91b5-9644ed407202.png?resizew=287)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486aa57b8d51f4bafedf8b31ed0b6452.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5452197f58d5f1b8e377d0f79069fbc.png)
您最近一年使用:0次
2020-04-27更新
|
1185次组卷
|
4卷引用:江西省吉安市泰和中学2022-2023学年高一下学期7月月考数学试题
江西省吉安市泰和中学2022-2023学年高一下学期7月月考数学试题2020届百校联盟高三4月教育教学质量监测考试(全国Ⅰ卷) 数学(理)试题(已下线)考点24 空间几何体体积及表面积(练习)-2021年高考数学复习一轮复习笔记江苏省泰州市靖江市斜桥中学2020-2021学年高三上学期12月阶段性检测数学试题
名校
2 . 如图,直三棱柱
中,
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/04995d23-7b87-42b4-af22-6ed033682091.png?resizew=163)
(1)证明:
平面
;
(2)已知
与平面
所成的角为30°,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/04995d23-7b87-42b4-af22-6ed033682091.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319d234a0586478d4e73020d48b3a10.png)
您最近一年使用:0次
2020-05-13更新
|
2758次组卷
|
16卷引用:江西省吉安市2019-2020学年高三上学期期中数学(理)试题
江西省吉安市2019-2020学年高三上学期期中数学(理)试题江西省宜春市上高县第二中学2019-2020学年高三上学期11月月考数学(理)试题【市级联考】辽宁省丹东市2019届高三总复习质量测试(一)理科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)数学试题黑龙江省鹤岗市第一中学2019-2020学年高三上学期10月月考数学(理)试题湖北省襄阳市2019-2020学年高二上学期期末数学试题2020届河北省衡水中学高三年级上学期五调考试数学(理科)试题2020届黑龙江省实验中学高三上学期期末考试数学(理)试题四川省棠湖中学2019-2020学年高三下学期第二次月考数学(理)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山东济南市历城第二中学2019-2020学年高一下学期开学考试数学试题江苏省无锡市江阴市高级中学2019-2020学年高二下学期期中数学试题2020届河北省衡水中学高三高考考前密卷(一)数学(理)试题湖北省宜昌市天问高中2019-2020学年高二(下)开学数学试题人教B版(2019) 选择性必修第一册 过关斩将 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 1.2.4 二面角甘肃省永昌县第一中学2020-2021学年高三上学期第一次月考数学理试题
3 . 如图,在四棱锥
中,
平面
,
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/0f36106f-9a03-401a-8282-ca2ec013fa52.png?resizew=157)
(1)求
和平面
所成的角的大小.
(2)求二面角
的正弦值.
![](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/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace900749d0861aa51fcc6d72c51f82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/0f36106f-9a03-401a-8282-ca2ec013fa52.png?resizew=157)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e867e5c7ef4da37d8985ce82022060e.png)
您最近一年使用:0次
2019-06-07更新
|
982次组卷
|
5卷引用:【市级联考】江西省鹰潭市2019届高三第一次模拟考试(理)数学
名校
4 . 如图,在矩形
中,已知
,点
、
分别在
、
上,且
,将四边形
沿
折起,使点
在平面
上的射影
在直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/b4c3b8c0-8fd8-49a0-9adc-5f9dfacbf86e.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/c50a888a-2cc0-4d88-acab-71a5346dd40a.png?resizew=175)
(1)求证:
;
(2)求点
到平面
的距离;
(3)求直线
与平面
所成的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c84f75f412b897e3162efb783dbd7.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc799080c04e01ce595151e11d957c96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedde879f99aed69d745d5ec8fe62084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/b4c3b8c0-8fd8-49a0-9adc-5f9dfacbf86e.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/c50a888a-2cc0-4d88-acab-71a5346dd40a.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
您最近一年使用:0次
2017-05-27更新
|
295次组卷
|
2卷引用:江西省瑞昌市第二中学2016-2017学年高二下学期第二次段考数学(理)试题
5 . 如图,已知四边形
为菱形,平面
外一点
,
为边长等于2的正三角形, 且
在平面
的射影长等于
.
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654818782445568/1656209744388096/STEM/a1d971eca714475ba391d0aa586782f3.png?resizew=228)
(I)求点
到平面
的距离;
(II)求
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af54911aba2cbc44ec2479d0f05dfa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8b07862bbd2741526fa915bff899e7.png)
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654818782445568/1656209744388096/STEM/a1d971eca714475ba391d0aa586782f3.png?resizew=228)
(I)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
(II)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
您最近一年使用:0次
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:江西省赣州市十六县(市)十七校2021-2022学年高二上学期期中联考数学(理)试题