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1 . 国家主席习近平指出:中国优秀传统文化有着丰富的哲学思想、人文精神、教化思想、道德理念等,可以为人们认识和改造世界提供有益启迪.我们要善于把弘扬优秀传统文化和发展现实文化有机统一起来,在继承中发展,在发展中继承.《九章算术》作为中国古代数学专著之一,在其“商功”篇内记载:“斜解立方,得两堑堵,斜解堑堵,其一为阳马,一为鳖臑”.刘徽注解为:“此术臑者,背节也,或曰半阳马,其形有似鳖肘,故以名云”. 鳖臑,是我国古代数学对四个面均为直角三角形的四面体的统称.在四面体
中,PA⊥平面ACB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/58c3ca96-ee25-4cb8-8cc9-cb263cb93982.png?resizew=314)
(1)如图1,若D、E分别是PC、PB边的的中点,求证:DE
平面ABC;
(2)如图2,若
,垂足为C,且
,求直线PB与平面APC所成角的大小;
(3)如图2,若平面APC⊥平面BPC,求证:四面体
为鳖臑.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f44cc3030c28fdf4776b1a29c5df7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/58c3ca96-ee25-4cb8-8cc9-cb263cb93982.png?resizew=314)
(1)如图1,若D、E分别是PC、PB边的的中点,求证:DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef336bafe4e08c983d0286c13182d81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bf93402a48635572cbaadc2513ecd5.png)
(3)如图2,若平面APC⊥平面BPC,求证:四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f44cc3030c28fdf4776b1a29c5df7c.png)
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2022-10-20更新
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143次组卷
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2卷引用:四川省泸州市龙马高中2022-2023学年高二上学期第一次月考数学(理)试题
2 . 四棱锥
底面是边长为 1 的菱形,
,
是
的中点,
,
平面
.
![](https://img.xkw.com/dksih/QBM/2022/7/8/3018088938577920/3019482843414528/STEM/72bb03d3a24b41b59107425c831202f5.png?resizew=177)
(1)求直线
与平面
所成角;
(2)求证: 平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790e1f26a6b7010bab031c5bfc655c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb7c2c705f676a72118346e912ac56f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e7868ec8dd3bafbb50b970c2bd9e4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7fc4acb32d3a0724b750a6f427d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62dbf33af4bd0497b1d45009d2fece25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64b03bdd6fe567c99c15220aebbd63.png)
![](https://img.xkw.com/dksih/QBM/2022/7/8/3018088938577920/3019482843414528/STEM/72bb03d3a24b41b59107425c831202f5.png?resizew=177)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b957b55032f113a100990aabe320fcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64b03bdd6fe567c99c15220aebbd63.png)
(2)求证: 平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca96117009e3598a39d10ebcb1359d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e54073845d1ddb3526c9887524c197.png)
您最近一年使用:0次
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3 . 如图,在直三棱柱
中,
,
,E为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021544043560960/3023577646612480/STEM/3867385c98514522b71c4fcc07b1987f.png?resizew=213)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3be3dcde7b744f420a588cb8dd5b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021544043560960/3023577646612480/STEM/3867385c98514522b71c4fcc07b1987f.png?resizew=213)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88762049d100f82fc0635f93ad656c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becf2941e15d668d93ea6ed980afd0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
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2022-07-16更新
|
956次组卷
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6卷引用:四川省遂宁中学校2022-2023学年高二上学期9月月考数学(理)试题
名校
4 . 如图,在四棱锥P-ABCD中,底面ABCD是边长为2的正方形,点E、F分别是棱PC和PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/ab7f1bf1-a317-49e9-811b-5775a603632a.png?resizew=195)
(1)求证:EF
平面PAB;
(2)若AP=PD=2,平面PAD⊥平面ABCD,求直线PB和平面ABCD所成角的正切值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/ab7f1bf1-a317-49e9-811b-5775a603632a.png?resizew=195)
(1)求证:EF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(2)若AP=PD=2,平面PAD⊥平面ABCD,求直线PB和平面ABCD所成角的正切值.
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2022-09-17更新
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299次组卷
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3卷引用:四川省眉山第一中学2022-2023学年高二上学期10月月考数学(文科)试题
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解题方法
5 . 如图,在正三棱柱
中,D是棱BC上的点(不与点C重合),
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/a7306756-b1f1-4abf-b071-8a7102b27c23.png?resizew=145)
(1)证明:平面
平面
;
(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/f9499f0e312799d87f5377f30565abc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/a7306756-b1f1-4abf-b071-8a7102b27c23.png?resizew=145)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b9a3f868837555eb40234b3375f4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446091491fb55549972f35a206fcab1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
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2022-11-09更新
|
416次组卷
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3卷引用:四川省乐山沫若中学2022-2023学年高二上学期第二次月考(期中考试)数学(文)试题
四川省乐山沫若中学2022-2023学年高二上学期第二次月考(期中考试)数学(文)试题江苏省南京市2022-2023学年高二上学期期中数学试题(已下线)期中真题必刷易错60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
6 . 四棱锥
的底面ABCD是等腰梯形,
,平面
平面ABCD,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/a3637709-fb8c-40a0-91d7-b55e0e1610ec.png?resizew=193)
(1)求证:
;
(2)求AP的长度;
(3)求直线AC与平面PBC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/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641aa755ada1d83daafc82d5f1fa88db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23190378f340ce5e8306f88c3caef1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3e27f6e6d1592408508cc9fd14d480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8825d400f453c5c17a7beeb1cc9a9cf3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/a3637709-fb8c-40a0-91d7-b55e0e1610ec.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
(2)求AP的长度;
(3)求直线AC与平面PBC所成角的正弦值.
您最近一年使用:0次
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7 . 如图,在三棱柱
中,点
在平面
上的射影为
的中点
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/255d6a1f-eeab-4b2f-ae25-1fa224296882.png?resizew=175)
(1)求证:
平面
;
(2)若
,求直线
与平面
所成角的正弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd8c13192ca45c16dad5d59b547220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1cb1df353c6907fec5823964eef36c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095d52314413eb48ceeeb7ac063c5b91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/255d6a1f-eeab-4b2f-ae25-1fa224296882.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46b4c7585238f53d85f5a96d35d95af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2022-07-18更新
|
1164次组卷
|
5卷引用:四川省内江市第六中学2022-2023学年高一(创新班)下学期入学考试数学试题
四川省内江市第六中学2022-2023学年高一(创新班)下学期入学考试数学试题山东省聊城市2021-2022学年高一下学期期末数学试题(已下线)8.6.2直线与平面垂直的判定定理(第1课时)(精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)模块四 专题2 期末重组综合练(山东)江西省萍乡市安源中学2022-2023学年高二下学期期中考试数学试题
名校
8 . 如图,在四棱锥
中,
,
平面PAB,
且
,F为PC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/8ea29f08-dd31-4c91-b1d1-0bd2965d166f.png?resizew=241)
(1)求证:
平面PAB;
(2)求直线PD与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860c4c9419ebfa927b3f3ea14e4f4784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0787d2cb66d00c49d3348b52acd407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2992befbac3f901fdbbdc75b7f6a8de5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/8ea29f08-dd31-4c91-b1d1-0bd2965d166f.png?resizew=241)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
(2)求直线PD与平面PBC所成角的正弦值.
您最近一年使用:0次
2022-06-28更新
|
528次组卷
|
6卷引用:四川省仁寿第一中学校南校区2023-2024学年高二上学期入学考试数学试题
9 . 如图,在四棱锥
中,平面
平面
,
是等边三角形,
//
,
,
,
是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/24/e0cb4a7f-a204-4f57-9fe5-5ee43efb5881.png?resizew=234)
(1)求证:
//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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee90881c743e2cff2e3128d6bdb86174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/24/e0cb4a7f-a204-4f57-9fe5-5ee43efb5881.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2022-06-23更新
|
957次组卷
|
3卷引用:四川省眉山市仁寿县2023-2024学年高二上学期1月期末模拟联考数学试题
四川省眉山市仁寿县2023-2024学年高二上学期1月期末模拟联考数学试题浙江省丽水市2021-2022学年高二下学期普通高中教学质量监控(期末)数学试题(已下线)第八章《立体几何初步》单元达标高分突破必刷卷(基础版)《考点·题型·技巧》
名校
10 . 如图,AB是圆O的直径,AB=2,C是圆O上一点,
,过点C的直线VC垂直于圆O所在平面,D,E分别是VA,VC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/8671c784-88a4-4703-8ef1-3bd9b941612b.png?resizew=173)
(1)求证:DE
平面VBC;
(2)若三棱锥V—ABC的体积为
,求VA与平面VBC所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1896fb53c246e921d2e2ff2c365bdb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/8671c784-88a4-4703-8ef1-3bd9b941612b.png?resizew=173)
(1)求证:DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(2)若三棱锥V—ABC的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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