1 . 如图,在以
为顶点的五面体中,面
为正方形,
,
,且二面角
与二面角
都是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/22/8b4d991a-1572-4076-a7d4-8107828cc9da.png?resizew=195)
(1)证明:
平面EFDC;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708b70cc6e08253e6b476dfbd1a2e749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9839448fd9fc1777c0638195d26a78d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0e38c274227cbc24bda9ecb457ebfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9726261c25e7086835912c0d4815d270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4343d561ca5566c09bccb8f321be0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/22/8b4d991a-1572-4076-a7d4-8107828cc9da.png?resizew=195)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962cdb84a4a8cc279bb54e19cb76c7fd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d4cf0fb44aa1e6bdaf2a4bdfb37e.png)
您最近一年使用:0次
解题方法
2 . 我国古代数学名著《九章算术》第五卷“商功”中,把底面为矩形且有一条侧棱与底面垂直的四棱锥称为“阳马”.今有“阳马”
,
平面
,
,
分别为棱
的中点,则下列选项错误的是( )
![](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/af0788c2784a2c5bb9f47ffef6902f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c6f395358daa8bf4b656e1e3c80eb7.png)
A.![]() ![]() | B.![]() ![]() |
C.平面 ![]() ![]() | D.平面![]() ![]() |
您最近一年使用:0次
3 . 如图,设E,F分别是长方体
的棱CD上的两个动点,点E在点F的左边,且满足
,有下列结论:( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/d5f0b1de-7aeb-45f6-9e1f-358403232564.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366e62778cd38f62e722b73d8cb9a542.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/d5f0b1de-7aeb-45f6-9e1f-358403232564.png?resizew=160)
A.![]() ![]() |
B.三棱锥![]() |
C.![]() ![]() |
D.平面![]() ![]() |
您最近一年使用:0次
2022-07-14更新
|
301次组卷
|
2卷引用:福建省山海联盟校教学协作体2021-2022学年高二下学期期末考试数学试题
4 . 已知平面四边形
,
,
(如图1所示),现将
沿
边折起,使得平面
平面
,点
为线段
的中点,
为线段
上一点,(如图2所示).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/626f0ceb-0a28-43c0-8acd-512bf367ef0c.png?resizew=243)
(1)求证:
平面
;
(2)若二面角
的余弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625bca170fed3fbdc1441b3c0df4a6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389df3a1b8b7c1b0a4296655c56ee33a.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/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/626f0ceb-0a28-43c0-8acd-512bf367ef0c.png?resizew=243)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b4e753ef119608188c46a50ec597e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9905491a66a3ee51536b204970ff7c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e468f168f3657d84d44be5eb89a62d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab735cbfb3c34c9e36ee059bca5ecdf.png)
您最近一年使用:0次
名校
5 . 如图,在三棱锥
中,
,
,
两两互相垂直,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/11/8a034a64-fdd7-4f98-88a6-279030b9dc3a.png?resizew=245)
(1)证明:
;
(2)设
,
,
和平面
所成角的大小为
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.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/9d78abbad68bbbf12af10cd40ef4c353.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/11/8a034a64-fdd7-4f98-88a6-279030b9dc3a.png?resizew=245)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf271d6475f5305bc922677b4cfe28c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a65b94de267eb6858634181642c65c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3427311203b1958b9ff89084c66a09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
您最近一年使用:0次
2022-07-10更新
|
637次组卷
|
5卷引用:福建省泉州第一中学2022-2023学年高二上学期暑假返校数学试题
福建省泉州第一中学2022-2023学年高二上学期暑假返校数学试题湖南省五市十校教研教改共同体2021-2022学年高一下学期期末数学试题(已下线)微专题16 利用传统方法轻松搞定二面角问题(已下线)高一下学期期末数学考试模拟卷01-2022-2023学年高一数学下学期期中期末考点大串讲(人教A版2019必修第二册)甘肃省张掖市某重点校2022-2023学年高一下学期7月月考数学试题
6 . 如图,在三棱锥
中,
,底面是以
为斜边的直角三角形,点
是
的中点,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016830414798848/3019125102215168/STEM/3e741ec7558e435db0ac59dded56be18.png?resizew=176)
(1)证明:
平面
;
(2)若
,直线
与平面
所成角的正切值为
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a83ed45064ec6e16c0024adfc8e2804.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016830414798848/3019125102215168/STEM/3e741ec7558e435db0ac59dded56be18.png?resizew=176)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5dbb63ac0cc9ee65a9449438d476e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3be336573dbf683457a5c86d3c996f.png)
您最近一年使用:0次
2022-07-09更新
|
800次组卷
|
3卷引用:福建省南平市2021-2022学年高一下学期期末质量检测数学试题
7 . 如图,在棱长为3的正方体
中.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/e56cebb3-feee-4057-99dd-621a9162708e.png?resizew=172)
(1)求证:
平面
;
(2)若
平面
,求证:点E为
的中心;
(3)若点P是平面
内一个动点,且
,求直线
与平面
所成角大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/e56cebb3-feee-4057-99dd-621a9162708e.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f904c1eed0804b9347c206ea167f1aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de463c3f6401db291b00653cf2873b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7988923407b9abb78ef8ab45829678fa.png)
(3)若点P是平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4cb0229fa724c87461d1ab83efb747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
您最近一年使用:0次
8 . 已知四棱锥
的底面为正方形,侧面PAD为等腰直角三角形,
,平面
平面ABCD,平面
平面
.
平面PAD;
(2)设M为l上一点,求PC与平面MAD所成角正弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678394dd1edfa867e205de2a41b3f594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1084a42a7b7600ac9651a023de6d3401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9df740160690029ac1e730c85f20347.png)
(2)设M为l上一点,求PC与平面MAD所成角正弦值的最小值.
您最近一年使用:0次
2022-07-08更新
|
786次组卷
|
5卷引用:福建省泉州师范学院附属鹏峰中学2022-2023学年高二上学期8月份统一考试数学试题
9 . 已知直三棱柱
中,侧面
为正方形,
,
,
分别为
和
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/36666de6-34fe-4c23-859d-2478b45412bc.png?resizew=134)
(1)求三棱锥
的体积;
(2)已知
为棱
上的动点,设直线
与平面
所成角为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0023280949eda97787964f0a9d41ed2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/36666de6-34fe-4c23-859d-2478b45412bc.png?resizew=134)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e08cc98c3c18d189824358dec8de72e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa279d85f7cb724fc05fe2917b3b8f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,平行四边形
所在平面与半圆弧
所在平面垂直,
是
上异于
,
的点,
为线段
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/e3f9f03e-768c-433a-b8e8-66a2c9e4f5bf.png?resizew=233)
(1)证明:
平面
;
(2)证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2aabb3232e9ffabad9def25515cbdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/e3f9f03e-768c-433a-b8e8-66a2c9e4f5bf.png?resizew=233)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a90c5466cb1f9810d2739a7634a4352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb23a04ac9df27fb987126e7ba0f6c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c5ef850e256c98ca4f033999e61311.png)
您最近一年使用:0次
2022-07-06更新
|
630次组卷
|
3卷引用:福建省龙岩市2021-2022学年高一下学期期末教学质量检查数学试题