名校
1 . 如图,在四棱锥
中,底面
是边长为2的正方形,侧面
为等边三角形,顶点
在底面上的射影在正方形
外部,设点
,
分别为
,
的中点,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/ffdd15f5-0ccd-4389-a1d5-8442287af7e6.png?resizew=187)
(1)证明:
平面
;
(2)若四棱锥
的体积为
,设点
为棱
上的一个动点(不含端点),求直线
与平面
所成角的正弦值的最大值.
![](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/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/ffdd15f5-0ccd-4389-a1d5-8442287af7e6.png?resizew=187)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbbe7f48676298f2ee0cb1901992eaf.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c9298da3cd8b9db58692e0173f3fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-11-11更新
|
339次组卷
|
3卷引用:福建省泉州市永春第一中学2023-2024学年高二上学期期中数学试题
名校
2 . 如图所示,等边
所在平面与菱形
所在平面相垂直,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b85d7d422571c4cc3aa5e09505fd67.png)
平面
;
(2)求平面
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba4d0b54a0b2104e1c3a2061e4bffc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9087c01257b50f3bb8b6490d8804dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b85d7d422571c4cc3aa5e09505fd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2023-08-16更新
|
528次组卷
|
2卷引用:福建省厦门第一中学2022-2023学年高二下学期期中数学试题
名校
3 . 如图,在多面体
中,平面
平面
.四边形
为正方形,四边形
为梯形,且
,
是边长为1的等边三角形,
为线段
三等分点(靠近点
),
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/7678c3e5-bc5e-4acc-ba99-f66e71160243.png?resizew=237)
(1)求证:
;
(2)求直线
与平面
所成角的正弦值;
(3)线段
上是否存在点
,使得直线
平面
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866a6cb2f0ef738f62fa9fa372c0819b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d16a4959a99193a52d6fa8648cb2eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02795ff1af51fb0672800ceb02e7893.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/7678c3e5-bc5e-4acc-ba99-f66e71160243.png?resizew=237)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc553932ce81b2c940b34b28d80c8146.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a20ea69475dcf57a5ff18c13eceaaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff65109fbe7d397800f32b47cf38a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459b45690bb921bbae09065b3df9f1f.png)
您最近一年使用:0次
2022-10-26更新
|
873次组卷
|
2卷引用:福建省泉州第一中学2021-2022学年高二上学期期中考试数学试题
解题方法
4 . 如图,在多面体
中,四边形
是直角梯形,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/beaac8de-694f-4795-ade3-366852fe4428.png?resizew=158)
(1)证明:
平面
.
(2)若
,求平面
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.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/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed619e2dc900c52a29012e5b821451bc.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/4b28bf7a1162221c19758f421f012650.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/beaac8de-694f-4795-ade3-366852fe4428.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75aea24647cd4d0b4b9aa513bf5457b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8fe122a768a4d78b5b39817d557a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在棱长为1的正方体
中,P为棱
的中点,Q为正方形
内一动点(含边界),则下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/67e2df88-5a04-4e60-9457-1d2c032cc1f4.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/67e2df88-5a04-4e60-9457-1d2c032cc1f4.png?resizew=144)
A.若![]() ![]() |
B.存在Q点,使得![]() ![]() |
C.当且仅当Q点落在棱![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2022-03-23更新
|
4916次组卷
|
10卷引用:福建省漳州市第三中学2022-2023学年高二下学期期中数学试题
福建省漳州市第三中学2022-2023学年高二下学期期中数学试题广东省广州市第六中学2023-2024学年高二上学期期中数学试题浙江省温州市苍南县金乡卫城中学2022-2023学年高二下学期3月第一次月考数学试题江苏省淮安市六校联盟2022-2023学年高二下学期5月学情调查数学试题八省八校(T8联考)2022届高三下学期第二次联考数学试题江苏省南京师范大学附属中学2022-2023学年高三上学期10月月考数学试题山东省济宁市汶上县第一中学2022-2023学年高三上学期12月月考数学试题湖南省长郡中学2023届高三下学期月考(七)数学试题河北省石家庄市正中实验中学2024届高三上学期月考(四)数学试题(已下线)空间向量与立体几何
名校
解题方法
6 . 如图,矩形ABCD中,
,E为边AB的中点,将△ADE沿直线DE翻折成△A1DE(点
不落在底面BCDE内),若M为线段A1C的中点,则在△ADE翻转过程中,以下命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/a94008cc-d72b-4be6-becf-99f8735d962e.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e57c789cfd4b0be7dbf63aa99435656.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/a94008cc-d72b-4be6-becf-99f8735d962e.png?resizew=192)
A.四棱锥![]() ![]() | B.线段BM长度是定值 |
C.MB//平面A1DE一定成立 | D.存在某个位置,使![]() |
您最近一年使用:0次
2022-10-30更新
|
598次组卷
|
6卷引用:福建师范大学附属中学2021-2022学年高二上学期期中考试数学试题
名校
解题方法
7 . 如图,在正方体
中,点
是线段
(含端点)上的动点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/1/6/2888496258179072/2889214410006528/STEM/a6d8ce41-a6c9-49c8-8238-98a0eac7c620.png?resizew=176)
![](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/e539f26ed5e0b20ff7220559324869a4.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2888496258179072/2889214410006528/STEM/a6d8ce41-a6c9-49c8-8238-98a0eac7c620.png?resizew=176)
A.存在点![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.无论点![]() ![]() ![]() |
D.无论点![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-01-07更新
|
885次组卷
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5卷引用:福建省泉州市安溪一中、养正中学、惠安一中、泉州实验中学2022-2023学年高二上学期期中联考数学试题
名校
8 . 如图所示,在三棱柱
中,
,点
在平面
的射影为线段
的中点,侧面
是菱形,过点
、B,D的平面
与棱
交于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/631e9b44-e123-41f6-b1ec-0ec73c275a27.png?resizew=162)
(1)在图中作出截面
,并证明四边形
为矩形;
(2)若
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/631e9b44-e123-41f6-b1ec-0ec73c275a27.png?resizew=162)
(1)在图中作出截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202794c51b2166eca170da9c53247bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202794c51b2166eca170da9c53247bea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
您最近一年使用:0次
名校
9 . 如图,正方体ABCD-A1B1C1D1的棱长为2,E是棱AB的中点,F是侧面AA1D1D内一点,若EF∥平面BB1D1D,则EF长度的范围为
![](https://img.xkw.com/dksih/QBM/2019/8/9/2264962318884864/2290458070507520/STEM/71471bcc-ffc6-4f15-a4ee-650533fb860b.png)
![](https://img.xkw.com/dksih/QBM/2019/8/9/2264962318884864/2290458070507520/STEM/71471bcc-ffc6-4f15-a4ee-650533fb860b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-09-14更新
|
3933次组卷
|
21卷引用:福建省泉州市第七中学2022-2023学年高二上学期期中考试数学试题
福建省泉州市第七中学2022-2023学年高二上学期期中考试数学试题黑龙江大庆实验中学2019-2020学年下学期实验三部期中考试高二数学理科试题黑龙江大庆实验中学2019-2020学年高二下学期线上期中考试数学(理)试题广东省佛山市顺德区罗定邦中学2020-2021学年高二上学期期中数学试题宁夏石嘴山市第三中学2019-2020学年高二上学期期末考试数学(理)试题甘肃省天水市秦州区第一中学2019-2020学年高二上学期期末数学(理)试题四川省阆中中学2019-2020学年高二4月月考数学(理)试题甘肃省天水市第一中学2019-2020学年高二上学期第三次学段(期末)考试数学(理)试题河南省平顶山市鲁山县第一高级中学2019-2020学年高二4月月考数学(理科)试题安徽省阜阳市太和第一中学2020-2021学年高二(奥赛班)上学期开学考试数学试题浙江省台州市三梅中学2020-2021学年高二上学期10月第一次教学检测数学试题黑龙江省绥化市青冈县第一中学2020-2021学年高二第一学期月考(腾飞班)数学(理)试题湖南师大附中2020-2021学年高二上学期入学考试(第一次大练习)数学试题河北省石家庄二十二中2023-2024学年高二上学期第一次月考(10月)数学试题陕西省西安市第三中学2023-2024学年高三上学期期中数学(理科)试题广东省湛江市雷州市第二中学2023-2024学年高二上学期11月月考数学试题北京市西城区北师大附中2018-2019学年高一下学期期末数学试题(已下线)必刷卷05-2020年高考数学必刷试卷(新高考)【学科网名师堂】-《2020年新高考政策解读与配套资源》(已下线)卷05-2020年高考数学冲刺逆袭必备卷(山东、海南专用)【学科网名师堂】吉林省长春市农安县实验中学2019-2020学年高一下学期期末考试数学试题湖北省宜昌一中、龙泉中学2020届高三下学期6月联考数学(文)试题