1 . 如图,正方体
的棱长为2,O为
的中点,点E在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/115abe2b-d05e-466d-8191-feeae408bb40.png?resizew=164)
(1)证明:
平面ABCD;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80511b9849344e1d0906e3fc42d4b850.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/115abe2b-d05e-466d-8191-feeae408bb40.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af142a6050b54e8b5777a085d4597481.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becf2941e15d668d93ea6ed980afd0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
您最近一年使用:0次
解题方法
2 . 在图甲所示的四边形
中,
,
,
,
,沿
将
进行翻折,使得
,得到如图乙所示的四棱锥
.四棱锥
的体积为
,
为边
上的动点(不与端点
,
重合).
(1)若
为
的中点,求证:
;
(2)设
,试问:是否存在实数
,使得锐二面角
的余弦值为
?若存在,求出实数
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6956513649811bd1a2f8c3e4ca8793c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8edaed541a0f4ec6c8c7f22f37639796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795d1f8e68aee16240a4018dcbcb1e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f15a7b73234e611993abefa7d91c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d74ef32584586ec4857acd0a3f4fe9.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/6337ec36-b13a-4219-bc3b-fad2819d2536.png?resizew=300)
(1)若
![](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/f0efbdc4cbc82cc55bed9905f81fbfc2.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cd314bbb958ce941210a4b84584f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1a4b8e6a3514ac93b69042d1f9553b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ee522b7fcdbbdd63bdf31419e1bbc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解题方法
3 . 如图,正方体
的棱长为2,
为
的中点,平面
与棱
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/6e3410c5-4569-433f-9e1b-5673442d0e03.png?resizew=159)
(1)求点
到平面
的距离;
(2)求证:
是
的中点.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/6e3410c5-4569-433f-9e1b-5673442d0e03.png?resizew=159)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
您最近一年使用:0次
4 . 【多选】如图,已知正方体
的棱长为
,
、
分别为棱
、
的中点,则下列结论正确的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2024-04-17更新
|
284次组卷
|
7卷引用:广东省深圳市南山区2022-2023学年高二上学期期末数学试题
广东省深圳市南山区2022-2023学年高二上学期期末数学试题甘肃省武威市凉州区2022-2023学年高二下学期期中考试数学试题(已下线)2.4.1 空间直线的方向向量和平面法向量(同步练习)-【素养提升—课时练】2022-2023学年高二数学湘教版选择性必修第二册检测(基础篇)福建省莆田锦江中学2022-2023学年高二下学期期中质检数学试题(已下线)专题04用空间向量研究直线、平面的位置关系(4个知识点6种题型2个易错点)(3)(已下线)通关练02 用空间向量的解决平行垂直问题10考点精练(50题) - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)福建省漳州市平和正兴学校2023-2024学年高二下学期4月月考数学试题
名校
解题方法
5 . 在棱长为3的正方体
中,
为线段
靠近
的三等分点.
为线段
靠近
的三等分点,则直线
到平面
的距离为______ .
![](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/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de8026bd1b6af298df08e532c2847d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
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2024-01-12更新
|
292次组卷
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4卷引用:广东省肇庆市加美学校2024届高三上学期数学模拟卷(一)
广东省肇庆市加美学校2024届高三上学期数学模拟卷(一)江苏省无锡市辅仁高级中学2023-2024学年高二上学期期中考试数学试卷四川省眉山市彭山区第一中学2023-2024学年高二下学期开学考试数学试题(已下线)第6章 空间向量与立体几何单元综合测试卷-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)
名校
解题方法
6 . 如图,正方体
的棱长为2,线段
上有两个动点E,F(E在F的左边)且
,下列说法错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/208e9cd4-8068-45c4-925f-5c3f90e748ff.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6469878a955cc09fac22ba5aea3fb962.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/208e9cd4-8068-45c4-925f-5c3f90e748ff.png?resizew=140)
A.当E,F运动时,存在点E,F使得![]() |
B.当E,F运动时,存在点E,F使得![]() |
C.当E运动时,二面角![]() ![]() |
D.当E,F运动时,二面角![]() ![]() |
您最近一年使用:0次
2023-12-30更新
|
273次组卷
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2卷引用:广东省广州市第八十九中学2023-2024学年高二上学期第十五周测数学试题
7 . 如图,四面体
的每条棱长都等于
,
分别是
上的动点,则
的最小值是________ ,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8996e6f92f6005ccddb9334a70ff4cb0.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8996e6f92f6005ccddb9334a70ff4cb0.png)
您最近一年使用:0次
名校
解题方法
8 . 长方体
中,
,
.点
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/a5b069ed-227e-4938-9540-a82305a05945.png?resizew=158)
(1)求证:
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480f4df0a32a910db7d39695ffd86665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/a5b069ed-227e-4938-9540-a82305a05945.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f11f1840eb8b17e7b07c3fe7e987a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,在长方体
中,
分别是
的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/ddcfa514-ed43-4bd8-a884-9e7f6b294c36.png?resizew=190)
(1)四边形
为平行四边形;
(2)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b6219f8981ef06c42ce862276ac967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f026b3bddc9e24511f96105bdc18a1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/ddcfa514-ed43-4bd8-a884-9e7f6b294c36.png?resizew=190)
(1)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef5ea43614d815c3abb27a42dfb101b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adf679c5b5063388202ee10d28ee8c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
您最近一年使用:0次
10 . 如图,在棱长为2的正方体
中,点
分别在线段
和
上,则下列结论中错误的结论( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
A.![]() |
B.四面体![]() ![]() |
C.有且仅有一条直线![]() ![]() |
D.存在点![]() ![]() |
您最近一年使用:0次
2023-11-14更新
|
642次组卷
|
7卷引用:广东省珠海市第一中学2023-2024学年高二上学期1月阶段测试数学试题
广东省珠海市第一中学2023-2024学年高二上学期1月阶段测试数学试题广东省潮州市2023-2024学年高二上学期期末教学质量检测数学试题上海市川沙中学2023-2024学年高二上学期期中数学试题福建省三明市五县2023-2024学年高二上学期期中联合质检考试数学试题(已下线)专题01 空间向量与立体几何(6)(已下线)专题01 空间向量与立体几何(2)(已下线)第3章 空间向量及其应用 (单元重点综合测试)-2023-2024学年高二数学单元速记·巧练(沪教版2020选择性必修第一册)