名校
1 . 如图,在四棱锥
中,已知底面
是正方形,
底面
,且
是棱
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/611853af-c7ef-4dcb-a433-d15c21266e57.png?resizew=142)
(1)若
平面
,证明:
是
的中点.
(2)线段
上是否存在点
,使二面角
的余弦值是
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a1d668da8b3e0333b95ce5843adf19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ce408275a91a6e8c5f2a174265ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/611853af-c7ef-4dcb-a433-d15c21266e57.png?resizew=142)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826bf6fa3706921b77ad0eb4fcc206bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d71190e0bf7d159f025f927372ff9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63df78dd883e274ecf7d4017ef5efcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956adbca7e7f83d798de829ca03ac6e4.png)
您最近一年使用:0次
2022-10-19更新
|
1234次组卷
|
5卷引用:黑龙江省佳木斯市第八中学2023届高三下学期开学考试数学试题
名校
2 . 如图,梯形
中,
,垂 足为点
. 将
沿
折起,使得点
到点
的位放,且
,连接
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/4c318440-8876-423b-a468-5bf7781afa95.png?resizew=495)
(1)证明:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d5e96f0e182faf25ab977905bddb68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377240724a516ade73c383c5d13c65ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0fd6592f6ac9781a7660d6ebea47ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/4c318440-8876-423b-a468-5bf7781afa95.png?resizew=495)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425bb0d1c21eb4448dbbe9a41efa7538.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5ff76d62b0ce60fd66fce91b737515.png)
您最近一年使用:0次
2022-10-14更新
|
617次组卷
|
3卷引用:陕西省咸阳市高新一中2022-2023学年高三上学期第一次质量检测理科数学试题
名校
3 . 如图,圆柱的轴截面
为正方形,点
在底面圆周上,且
为
上的一点,且
为线段
上一动点(不与
重合)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/154f5638-5181-4e3f-93c1-33127df3bef6.png?resizew=154)
(1)若
,设平面
面
,求证:
;
(2)当平面
与平面
夹角为
,试确定
点的位置.
![](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/2675e2171c51891dc71f4284cda8a270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e435ea47d99bd1b504bf687eb0e2aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a051702dc3c9f71e25dec5abdd614426.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/154f5638-5181-4e3f-93c1-33127df3bef6.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ac7b134d8d1136f90233addaa4723f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f9d777e73144d82613eb2d1d8d7914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34b4e211e0adddf347e9db9c84e2985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7218869e4014b0f5bba8822e5f8a16.png)
(2)当平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
2022-10-11更新
|
1870次组卷
|
5卷引用:广东省汕头市潮阳实验学校2024届高三上学期摸底数学试题
广东省汕头市潮阳实验学校2024届高三上学期摸底数学试题湖南省岳阳地区2023届高三上学期适应性考试数学试题广东省佛山市顺德区容山中学2022-2023学年高二上学期期中数学试题福建省厦门第一中学2022-2023学年高二上学期期中考试数学试题(已下线)期中押题预测卷(考试范围:选择性必修第一册)(提升卷)-【单元测试】2022-2023学年高二数学分层训练AB卷(人教B版2019)
解题方法
4 . 已知
,
是两个不同的平面,m,n是平面
及
外的两条不同的直线.给出以下四个论断:①
;②
;③
;④
,以其中的三个论断作为条件,余下一个论断作为结论,可以得到以下四个命题,其中正确的命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c8210eadb24a76eccacaaff9ef9df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58645e141cf81e1962ec8692e5edbfa5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
5 . 如图,在正方体ABCD﹣A1B1C1D1中,AB=2,P为CC1的中点,点Q在四边形DCC1D1内(包括边界)运动,若AQ∥平面A1BP,则AQ的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/59b1ed9a-1dae-420b-aa14-0cf41788a9b1.png?resizew=173)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/59b1ed9a-1dae-420b-aa14-0cf41788a9b1.png?resizew=173)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-09-21更新
|
1093次组卷
|
5卷引用:安徽省皖南八校2022-2023学年高三上学期开学考试数学试题
安徽省皖南八校2022-2023学年高三上学期开学考试数学试题(已下线)9.5 空间向量与立体几何(已下线)第03讲 直线、平面平行垂直的判定与性质(练)山东省东营市广饶县第一中学2022-2023学年高二上学期10月月考数学试题(已下线)8.5.3 平面与平面平行 (精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)
解题方法
6 . 在直四棱柱
中,四边形
为菱形,
,
,E,F分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/67427ec5-80df-4bb7-8591-fdbb9c25b912.png?resizew=214)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af405392c66b86550a58f1cb9868717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/67427ec5-80df-4bb7-8591-fdbb9c25b912.png?resizew=214)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
名校
解题方法
7 . (多选)如图,正方体
的棱长为1,P为BC的中点,Q为线段
上的动点,过点A,P,Q的平面截该正方形所得的截面记为S,则下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/3cbfba6e-bdc5-4992-984e-d7521bcaae15.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dfda77ecf61013170a6f43b4d9d116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/3cbfba6e-bdc5-4992-984e-d7521bcaae15.png?resizew=184)
A.异面直线![]() ![]() ![]() |
B.当Q运动到某一点时,S可能是五边形 |
C.当![]() |
D.当CQ=1时,S为矩形 |
您最近一年使用:0次
2022-09-19更新
|
1132次组卷
|
4卷引用:河北省秦皇岛市青龙满族自治县实验中学等两校联考2024届高三上学期开学考试数学试题
河北省秦皇岛市青龙满族自治县实验中学等两校联考2024届高三上学期开学考试数学试题(已下线)9.3 空间点、直线、平面之间的位置关系江苏省镇江第一中学2021-2022学年高一下学期期中数学试题(已下线)第25讲 平面的交线截面问题
8 . 如图,在正方体
中,动点
在线段
上,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/bb095c42-418b-414c-8ce6-2597dcfd02f4.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/bb095c42-418b-414c-8ce6-2597dcfd02f4.png?resizew=172)
A.直线![]() ![]() ![]() |
B.对任意的点![]() ![]() ![]() |
C.存在点![]() ![]() ![]() ![]() |
D.存在点![]() ![]() ![]() |
您最近一年使用:0次
解题方法
9 . 在如图所示的多面体中,
,四边形
为矩形,
,
.
![](https://img.xkw.com/dksih/QBM/2022/9/11/3064021239562240/3065827235086336/STEM/6a7ae01d7af44780aade7c2ac948155d.png?resizew=242)
(1)求证:平面
平面
;
(2)设半面
平面
,
,
平面
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbc56d42b003cbcb1fbe5c50e55b26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940078c89bad1724a5d7006a54755398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e0b7d845cbceccd3e76ca461fcc534.png)
![](https://img.xkw.com/dksih/QBM/2022/9/11/3064021239562240/3065827235086336/STEM/6a7ae01d7af44780aade7c2ac948155d.png?resizew=242)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85469a248bf54671d1f500b7812ff100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14eec658f69c267a70c1e8f9b744e282.png)
(2)设半面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd788591c314f3b540b4b89ee5cdec8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4b51508bd85c1a47f822c39fbc39b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b755d315e74d8833765f2b1693b78d.png)
您最近一年使用:0次
名校
10 . 在棱长为2的正方体
中,点E,F分别为棱AB,
的中点.点P为线段EF上的动点.则下面结论中错误 的是( )
![](https://img.xkw.com/dksih/QBM/2022/9/1/3057144972623872/3064292708958208/STEM/e106b75cbe4b42a3aec3039f95d2a456.png?resizew=258)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/2022/9/1/3057144972623872/3064292708958208/STEM/e106b75cbe4b42a3aec3039f95d2a456.png?resizew=258)
A.![]() | B.![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2022-09-11更新
|
1032次组卷
|
8卷引用:北京市2023届高三上学期入学定位考试数学试题
北京市2023届高三上学期入学定位考试数学试题北京市第五十五中学2023届高三上学期10月月考数学试题内蒙古自治区第一中学2022-2023学年高三上学期10月月考数学(理科)试题北京市第十四中学2023届高三上学期期中检测数学试题广东省广州市第十七中学2022-2023学年高一上学期期中数学试题(已下线)期中押题预测卷(考试范围:选择性必修第一册)(提升卷)-【单元测试】2022-2023学年高二数学分层训练AB卷(人教B版2019)山东省淄博市淄博第一中学2022-2023学年高二上学期10月月考数学试题浙江省宁波市北仑中学2023-2024学年高二上学期期中考试数学试题