名校
1 . 如图,在直三棱柱
中,
是棱BC上一点(点D与点
不重合),且
,过
作平面
的垂线
.
;
(2)若
,当三棱锥
的体积最大时,求AC与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9d2462e6dbd321cf3abae25a56adf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bcc3c5b41a01362779683f5b70710c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446091491fb55549972f35a206fcab1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5445220e9b81a876e359615859a5a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
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7日内更新
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371次组卷
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4卷引用:海南省2022-2023学年高二下学期学业水平期中考试数学试题
名校
2 . 如图所示,在四棱锥
中,
,
,
,
为正三角形.
在平面
上的射影
为
的外心(外接圆的圆心);
(2)当二面角
为
时,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/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08062a925efb07c38a229b8628e3b41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399d731913a563e291b817831a0c678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745e0525a41fe2e2a7739c75a942290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
您最近一年使用:0次
2024-06-16更新
|
321次组卷
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3卷引用:河南省濮阳市2024届高三第三次模拟考试数学试题
名校
解题方法
3 . 如图,在三棱柱
中,平面
平面
,
.
为
中点,证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16867cc0fe4d229ff757b6bc44dcac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf1cc9995c3846117daa8cf10aadf22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4525d2a5cfdd4c82f62c28177d6cf9.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447ead7907c10dad61dd486b66831d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
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2024-04-16更新
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4卷引用:福建省福州市2024届高三第三次质量检测数学试题
4 . 如图,在四棱柱
中,二面角
均为直二面角.
平面
;
(2)若
,二面角
的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dff61f54b645b5a0fb9c7a53ac74a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f26accac75d654e05a0cbdd7e9ff902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e866c8eefea85a452590782a7e1f930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5509269c540ac83ba34d2e8a31242903.png)
您最近一年使用:0次
2024-03-27更新
|
642次组卷
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3卷引用:河南省焦作市2024届高三第二次模拟考试数学试题
河南省焦作市2024届高三第二次模拟考试数学试题河南省濮阳市2024届高三下学期第一次模拟考试数学试题(已下线)专题06 空间直线﹑平面的垂直(一-《知识解读·题型专练》(人教A版2019必修第二册)
解题方法
5 . 在三棱锥
中,
,
,
,
,
.
(1)如图1,G为△PBC的重心,若
平面PAB,求
的值;
(2)如图2,当
,且二面角
的余弦值为
时,求直线PD与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f6094178afeeacdcdec10d7bde05b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209377196940bffa8ffa5f55b9c59fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/775976772e3ec565820397ae8deda0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d2919e5bd26b5e9be672a3ff7604cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/3a74d83a-dadd-48cb-934b-80529a0144f9.png?resizew=255)
(1)如图1,G为△PBC的重心,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26dee2a75ce2b52cdceefc5e863ac5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
您最近一年使用:0次
2024-03-20更新
|
497次组卷
|
2卷引用:河南省济洛平许2024届高三第三次质量检测数学试题
名校
6 . 如图,在四棱台
中,底而
为平行四边形,侧棱
平面
,
,
,
.
;
(2)若四棱台
的体积为
,求平面
与平面
所成的锐二面角的余弦值.
![](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/9ddbb0422a136f45653c8c369f2d75fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e0e6eb66314772b2f9944cf130da94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dbf31dfd36aa456a63bafea8bc1985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e588c032e5f3698cbd35f8dcd61f9a2.png)
(2)若四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa0d73f30a242947aaf7da525926266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2024-03-01更新
|
2553次组卷
|
5卷引用:辽宁省八市八校2024届度高三第二次联合模拟考试数学试题
解题方法
7 . 如图,在斜三棱柱
中,
,且三棱锥
的体积为
.
(1)求三棱柱
的高;
(2)若平面
平面
为锐角,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131b887a0a088c760df5e17bd93bfe6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d61d2b7b16e12fd97f870fb3fa522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/b7376265-a332-4131-9844-0dccb3b38662.png?resizew=168)
(1)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1111386161dc558c54930e35aa302737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bbdf5dbf9df96742624ada95c36146.png)
您最近一年使用:0次
2024-02-24更新
|
222次组卷
|
4卷引用:河南省濮阳市2023-2024学年高二上学期期末考试数学试题
8 . 如图,在四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
为棱
的中点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/4b635e56-de4b-4e1e-ae71-6ef75dcb94bb.png?resizew=151)
(1)求证:
;
(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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9062284cdc10c304084fd63b6ca94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2845d1a90be47826b3eeb59b3a1a55f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/4b635e56-de4b-4e1e-ae71-6ef75dcb94bb.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
您最近一年使用:0次
2024-02-24更新
|
329次组卷
|
4卷引用:河南省濮阳市2023-2024学年高二上学期期末考试数学试题
名校
9 . 如图,在四棱锥中,底面四边形
为正方形,且
,
,
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b17e6cbaf17c2ba0a1d333f02aebf58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2024-01-30更新
|
203次组卷
|
2卷引用:2023新东方高二上期末考数学01
名校
解题方法
10 . 布达佩斯的伊帕姆维泽蒂博物馆收藏的达·芬奇方砖是在正六边形上画了具有视觉效果的正方体图案(如图1),把三片这样的达·芬奇方砖拼成图2的组合,这个组合再转化成图3所示的几何体,若图3中每个正方体的棱长为1,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/c2f94995-1c1a-4518-8125-670b30c2af46.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/57bf31f2-7ea5-4241-b772-2e570d9e25c1.png?resizew=179)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/c2f94995-1c1a-4518-8125-670b30c2af46.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/57bf31f2-7ea5-4241-b772-2e570d9e25c1.png?resizew=179)
A.![]() |
B.若M为线段CQ上的一个动点,则![]() |
C.点F到直线CQ的距离是![]() |
D.异面直线CQ与![]() ![]() |
您最近一年使用:0次
2024-01-30更新
|
208次组卷
|
2卷引用:2023新东方高二上期末考数学01