解题方法
1 . 在如图所示的试验装置中,四边形框架
为正方形,
为矩形,
,且它们所在的平面互相垂直,
为对角线
的中点,活动弹子
在正方形对角线
上移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/e6385f05-9cbc-44ff-88ac-f078bebf1c40.png?resizew=163)
(1)若
,求
的值;
(2)当
为
的中点时,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20acf562ef2fbe5f10e6e1a2d3f0fdd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/e6385f05-9cbc-44ff-88ac-f078bebf1c40.png?resizew=163)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65cb17d27559c1179bce031cbeeb0636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7c9055d30aa0bcd1a1519efb2d4b1f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cb18c10820d927ecd53326f58aaf8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee5a94f9063a71581f409e47ebaf602.png)
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2 . 已知三棱锥
分别是
的中点,
是
的中点,设
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/f971dee4-6c2b-4db8-8139-b1525a35a832.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42a90b1568362c4aee62079142a039c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca65b9c5449c3ad19e136f9026b9bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc5343d0ed7b449971c7ba787a621fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/f971dee4-6c2b-4db8-8139-b1525a35a832.png?resizew=162)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
3 . 已知平行六面体
的各条棱长均为2,且有
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/5cd5d5e1-52df-4fbf-b59c-fa1050da090a.png?resizew=186)
(1)求证:
平面
:
(2)若
是
的中点,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/5cd5d5e1-52df-4fbf-b59c-fa1050da090a.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)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/1e04a51cfa4828ee9255213ef164755b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
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名校
4 . 已知向量
,
,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
成立的x为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90136425bd2ec9d496c1552053ac8560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c031592a97baa4871a4b67bbdea23c50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.-6 | B.6 | C.![]() | D.![]() |
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2024-01-04更新
|
534次组卷
|
10卷引用:广东省东莞市东莞中学松山湖学校2023-2024学年高二上学期第二次段考(期中)数学试题
广东省东莞市东莞中学松山湖学校2023-2024学年高二上学期第二次段考(期中)数学试题福建省福州市永泰县第一中学2023-2024学年高二上学期适应性练习数学试题山东省枣庄市市中区辅仁高级中学2023-2024学年高二上学期12 月月考数学试题浙江省杭州市八校联盟2021-2022学年高二上学期期中联考数学试题浙江省温州市乐清中学2021-2022学年高二上学期12月第二次月考数学试题吉林省长春外国语学校2021-2022学年高二下学期期初考试数学试题浙江省温州市乐清第二中学2021-2022学年高二上学期1月第一次月考数学试题天津市第四十七中学2021-2022学年高二上学期第二次月考数学试题河南省信阳市浉河区信阳高级中学2022-2023学年高二上学期期末数学(文)试题河南省信阳市浉河区信阳高级中学2022-2023学年高二上学期期末数学(理)试题
5 . 已知
,
,
是实数,则下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2024-01-03更新
|
288次组卷
|
2卷引用:广东省佛山市南海区2023-2024学年高一上学期12月期中学业水平统考数学试卷
名校
解题方法
6 . 已知长方体
中,
,
,点
为
的中点.
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/1b190440-b698-4fdb-abbe-a4e30a3ccef8.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e106d67ff8828b5fb9165de66ea28da7.png)
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7 . 在正三棱柱
中,
,
,
与
交于点
,点
是线段
上的动点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/32495cda-960a-4269-8816-14929d24011c.png?resizew=118)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/32495cda-960a-4269-8816-14929d24011c.png?resizew=118)
A.![]() |
B.存在点![]() ![]() |
C.三棱锥![]() ![]() |
D.直线![]() ![]() ![]() |
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8 . 如图,在四棱锥
中,底面
是矩形,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/27c665eb-23ca-40b8-9158-a99526f7bbd9.png?resizew=149)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](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/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f29c3e772e56008790298824122792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.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/editorImg/2024/1/1/27c665eb-23ca-40b8-9158-a99526f7bbd9.png?resizew=149)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2024-01-01更新
|
451次组卷
|
3卷引用:广东省东莞市七校2023-2024学年高二上学期期中联考数学试题
名校
解题方法
9 . 已知椭圆C的一个顶点为
,两焦点坐标分别为
,
.
(1)求椭圆C的标准方程;
(2)若直线
,与椭圆C交于不同的两点M,N,满足
,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71885f023172807ad43f2c9a670aa960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486279e7ff9f2b76c2ce712f5dedcb9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385afe18c3fad66fdeadf74be824283c.png)
(1)求椭圆C的标准方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becdcb8a871e8965853acf0687034c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b485b62d004d52fb31d6ed99ccb7669.png)
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名校
解题方法
10 . 如图,四棱锥
的底面是矩形,
底面
,
,
,M为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/6ad0dd56-103a-4711-b4f4-7fc42b57a66f.png?resizew=172)
(1)求证:
平面
;
(2)求点D到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d4d36ae30487030b827ce9413b9f13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/6ad0dd56-103a-4711-b4f4-7fc42b57a66f.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
(2)求点D到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
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