1 . 如图,圆柱的轴截面ABCD是正方形,点E在底面的圆周上,如果圆柱与三棱锥D—ABE的体积比等于3π,求直线DE与平面ABCD所成的角的大小.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854698838319104/2857372135186432/STEM/4a2a01aa17ec4d40849eb4e6698e0056.png?resizew=155)
您最近一年使用:0次
10-11高二下·贵州遵义·期末
名校
解题方法
2 . 某厂根据市场需求开发折叠式小凳(如图所示).凳面为三角形的尼龙布,凳脚为三根细钢管,考虑到钢管的受力和人的舒适度等因素,设计小凳应满足:①凳子高度为30cm,2三根细钢管相交处的节点
与凳面三角形
重心的连线垂直于凳面和地面.
![](https://img.xkw.com/dksih/QBM/2021/10/11/2827315184132096/2829814404890624/STEM/b401253acf5a47f2a599d0f72066a73f.png?resizew=221)
(1)若凳面是边长为20cm的正三角形,三只凳脚与地面所成的角均为45°,确定节点
分细钢管上下两段的比值(精确到0.01);
(2)若凳面是顶角为120°的等腰三角形,腰长为24cm,节点
分细钢管上下两段之比为2∶3,确定三根细钢管的长度(精确到0.1cm)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2021/10/11/2827315184132096/2829814404890624/STEM/b401253acf5a47f2a599d0f72066a73f.png?resizew=221)
(1)若凳面是边长为20cm的正三角形,三只凳脚与地面所成的角均为45°,确定节点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若凳面是顶角为120°的等腰三角形,腰长为24cm,节点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
2021-10-15更新
|
241次组卷
|
8卷引用:上海市市北中学2021-2022学年高二上学期10月月考数学试题
上海市市北中学2021-2022学年高二上学期10月月考数学试题(已下线)2010-2011学年贵州省遵义四中高二下学期期末考试理科数学重庆市渝北区、合川区、江北区等七区2019-2020学年高二下学期期末联考数学试题上海市七宝中学2021-2022学年高二上学期10月月考数学试题(已下线)上海市华东师范大学第二附属中学2021-2022学年高二上学期10月月考数学试题沪教版(2020) 必修第三册 新课改一课一练 期末测试A上海市位育中学2022-2023学年高二上学期10月月考数学试题沪教版(2020) 25天高考冲刺 双新双基百分百23
解题方法
3 . 如图,菱形
的边长为2,
,将
沿
翻折,使点
移至点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/9121d2dc-ac43-44e5-aba3-eec9b3a58895.png?resizew=212)
(1)求证:
;
(2)若二面角
的平面角为
,求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/9121d2dc-ac43-44e5-aba3-eec9b3a58895.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
2020-07-16更新
|
223次组卷
|
3卷引用:上海市静安区2019-2020学年高二下学期期末数学试题
上海市静安区2019-2020学年高二下学期期末数学试题(已下线)高二期末押题02-2020-2021学年高二数学下学期期末专项复习(沪教版)上海市致远高级中学2020-2021学年高二下学期3月月考数学试题
4 . 如图,
是平面
的斜线,
为斜足
平面
,
为垂足,
是平面
上的一条直线,
于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/0bb035a7-25c6-44dd-b8e1-4e49cc6d77f0.png?resizew=132)
(1)求证:
平面
;
(2)求
和平面
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6244ad33aac326b29e5111c97820ff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df0c656386b2889c4556d8309508463.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/0bb035a7-25c6-44dd-b8e1-4e49cc6d77f0.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3781cfd1cef95fc1c157c9e81ddbf5e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
5 . 如图,在长方体
中,
,
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/6a903747-fbce-4360-99a0-001e2f79dcb9.png?resizew=227)
(1)求证:平面
平面
;
(2)求
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b93998a9d472f21ee1b9df7266e5817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/6a903747-fbce-4360-99a0-001e2f79dcb9.png?resizew=227)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157770e4c9689b87ed922229e1682d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c73b73825032f9c9721e5ba1efc6c0.png)
您最近一年使用:0次
2019-12-03更新
|
332次组卷
|
2卷引用:上海市第六十中学2021-2022学年高二上学期期中数学试题
6 . 如图,在正方体
中,棱长为2,
、
分别是线段
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/73d9a6e9-7409-479d-9b39-1afd8f2a8013.png?resizew=160)
(1)正方体
中哪些棱所在的直线与直线
是异面直线?
(2)求直线
与平面
所成角的大小(结果用反三角函数值表示).
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/73d9a6e9-7409-479d-9b39-1afd8f2a8013.png?resizew=160)
(1)正方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
您最近一年使用:0次
7 . 若二面角
的平面角是直角,我们称平面
垂直于平面
,记作
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/100db5e3-b069-4e79-af8a-e1d14d9b197e.png?resizew=520)
(1)如图,已知
,
,
,且
,求证:
;
(2)如图,在长方形
中,
,
,将长方形
沿对角线
翻折,使平面
平面
,求此时直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ce3f859c6b9a0cfc98bdf5b3d0f395.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/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/100db5e3-b069-4e79-af8a-e1d14d9b197e.png?resizew=520)
(1)如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74742135157ce66703f899d52748b78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1754786a3367aca3da18ee3316e5b968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f56d4a08e50b95c1033c1ea3380c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6d8dcd07ffe20d7b6241d50eed2f31.png)
(2)如图,在长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bae5203f4b4acf23779114b3466e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c309e58bf083bad13abd549720a63a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
8 . 如图,在长方体
中,
、
分别是棱
、
的中点,
,
,求:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/91fa263f-bb8f-438f-9df8-c10aace3f4fb.png?resizew=161)
(1)
与
所成的角;
(2)
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0424446817f60c18f8e4e3cc202ad99.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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/91fa263f-bb8f-438f-9df8-c10aace3f4fb.png?resizew=161)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
9 . 如图所示,在四棱锥
中,底面
是平行四边形,
,
为
的中点,
平面
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220514461614080/2220747021090816/STEM/a9e8fd30ebd8481eab7b7307e7829f8a.png?resizew=164)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正切值.
![](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/52308a8a78dfdc965648c3970a222ddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae890f9e8b32aa53a54158f24f4a87bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220514461614080/2220747021090816/STEM/a9e8fd30ebd8481eab7b7307e7829f8a.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2018-06-22更新
|
1388次组卷
|
6卷引用:上海市新中高级中学2017-2018学年高二下学期期中数学试题
2013·上海黄浦·二模
名校
10 . 已知正四棱柱
的底面边长为2,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/15afdbb5-3b01-4579-b0a6-e8752930ccc3.png?resizew=135)
(1)求该四棱柱的侧面积与体积;
(2)若
为线段
的中点,求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e898e134e65cd30d84faf0e437d3e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/15afdbb5-3b01-4579-b0a6-e8752930ccc3.png?resizew=135)
(1)求该四棱柱的侧面积与体积;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2016-12-02更新
|
1081次组卷
|
5卷引用:上海市市西中学2022届高三上学期12月月考数学试题
上海市市西中学2022届高三上学期12月月考数学试题(已下线)2013届上海市黄浦区高三下学期二模数学试卷(已下线)上海市华东师范大学第二附属中学2018-2019学年高二下学期期末数学试题上海市奉城高级中学2020届高三上学期期中数学试题上海市闵行(文绮)中学2023-2024学年高三下学期5月月考数学试卷