名校
解题方法
1 . 如图,在三棱台
中侧面
为等腰梯形,
为
中点.底面
为等腰三角形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2023/5/14/3237517990559744/3257519325175808/STEM/1cd1426deba24b7db1826dd763b91861.png?resizew=233)
(1)证明:平面
平面
;
(2)记二面角
的大小为
.
①当
时,求直线
与平面
所成角的正弦值.
②当
时,求直线
与平面
所成角的正弦的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544dd24d8b800fc741dfee5377ed5156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61614650f765b4590a59853c776914c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2023/5/14/3237517990559744/3257519325175808/STEM/1cd1426deba24b7db1826dd763b91861.png?resizew=233)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945d27bb4d47e78d472186cb02314a8b.png)
(2)记二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea67423ce6963c0972867306169f17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a40d2cf43fce0c99dff3470d554eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b226e734dd7c58a5318622bd4ee21f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
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2023-06-11更新
|
404次组卷
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4卷引用:重庆市第一中学校2022-2023学年高一下学期期中数学试题
重庆市第一中学校2022-2023学年高一下学期期中数学试题重庆市第一中学校2022-2023学年高一下学期期中数学试题(已下线)第11讲 第一章 空间向量与立体几何 章末题型大总结(2)(已下线)专题4 立体几何与函数最值
名校
解题方法
2 . 如图,平面四边形ABCD中,
,
为正三角形,以AC为折痕将
折起,使D点达到P点位置,且二面角
的余弦值为
,当三棱锥
的体积取得最大值,且最大值为
时,三棱锥
外接球的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/d930e5ed-e24d-4b6e-8f3c-0426d3389d94.png?resizew=268)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08e91d2fa9519a5f48d488176700499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d74ef32584586ec4857acd0a3f4fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/d930e5ed-e24d-4b6e-8f3c-0426d3389d94.png?resizew=268)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-08更新
|
1572次组卷
|
5卷引用:重庆市乌江新高考协作体2022-2023学年高一下学期期末数学试题
22-23高二上·浙江绍兴·期末
名校
3 . 如图,在空间几何体
中,
均为正三角形,且平面
平面
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/9cbfcd2c-479e-4c1c-8ccc-02b1118bb0d2.png?resizew=143)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
平面
;
(2)
是棱
上的一点,当
与平面
所成角为
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0b9ab02cb88c54ca586dfff79ed1a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14172212b7b34eaf967c5a72233621c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/9cbfcd2c-479e-4c1c-8ccc-02b1118bb0d2.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399d731913a563e291b817831a0c678.png)
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2023-03-28更新
|
936次组卷
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3卷引用:重庆市三峡名校联盟2022-2023学年高一下学期联考数学试题
重庆市三峡名校联盟2022-2023学年高一下学期联考数学试题福建省福州格致中学2022-2023学年高一下学期期末考试数学试题(已下线)浙江省绍兴市上虞区2022-2023学年高二上学期期末数学试题
名校
4 . 如图,在长方体
中,
,M,N分别为棱
的中点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c805a619566a37180f6f4281c395e415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b3da308c73188350fb0f836952beea.png)
A.M,N,A,B四点共面 | B.直线![]() ![]() |
C.直线![]() ![]() ![]() | D.平面![]() ![]() |
您最近一年使用:0次
2022-11-24更新
|
1574次组卷
|
7卷引用:重庆市荣昌仁义中学校2023-2024学年高一下学期6月月考数学试题
重庆市荣昌仁义中学校2023-2024学年高一下学期6月月考数学试题第8章 立体几何初步 章末测试(提升)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)专题8.18 立体几何初步全章综合测试卷(提高篇)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)山西省运城市景胜中学2022-2023学年高一下学期5月月考数学试题(A卷)河南省许昌市许昌高级中学2023-2024学年高一下学期6月月考数学试题山东省青岛市莱西市2022-2023学年高三上学期期中数学试题江西省临川第二中学2022-2023学年高二上学期第三次月考数学试题
名校
5 . 在四面体中,二面角
、
、
的大小相等,则点
在平面
上的投影是
的
您最近一年使用:0次
2022-11-23更新
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2卷引用:重庆市中山外国语学校2022-2023学年高一下学期5月月考数学试卷
6 . 在《九章算术·商功》中,将四个面都是直角三角形的三棱锥称为“鳖臑”.如图,现将一矩形
沿着对角线
将
折成
,且点
在平面
内的投影
在线段
上.已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/5c4b9662-8fee-4c84-bb04-c49943c59ea9.png?resizew=354)
(1)证明:三棱锥
为鳖臑;
(2)点
到平面
的距离;
(3)求二面角
的正弦值.
![](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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c79e56bc6f1db8f446fc5bd34a08865.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/5c4b9662-8fee-4c84-bb04-c49943c59ea9.png?resizew=354)
(1)证明:三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,有一个正四棱柱,E、F分别为底面棱
,
的中点,
,
,点G在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/1e5de2c4-296a-421b-8955-9a57dd22b9a3.png?resizew=148)
(1)判断直线BG是否在平面BEF内?说明理由;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d0fdc5a00ca0e857b89a7e1420df29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41596f12b79926ccdbce2a3f5751fd74.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/1e5de2c4-296a-421b-8955-9a57dd22b9a3.png?resizew=148)
(1)判断直线BG是否在平面BEF内?说明理由;
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f007425ebc9d1bcd008f6b6e755d518.png)
您最近一年使用:0次
名校
8 . 如图,三棱柱ABC—
的底面是等腰直角三角形,侧面BB1C1C是矩形,
,
,点P是棱
的中点,且P在平面ABC内的射影O在线段BC上,
,点M,N分别是线段CP,CA的中点
![](https://img.xkw.com/dksih/QBM/2022/7/15/3023092430725120/3024043244724224/STEM/8a1b97dadb984e62835fd131d5b068ff.png?resizew=247)
(1)求证: MN//平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea757c19148fbebb6fb9fc86f34621c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8f940b796af67206b3f9dd410a407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85202369fd470728352c03715f62c88.png)
![](https://img.xkw.com/dksih/QBM/2022/7/15/3023092430725120/3024043244724224/STEM/8a1b97dadb984e62835fd131d5b068ff.png?resizew=247)
(1)求证: MN//平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324a1792318a3528772781fac2b4d2e4.png)
您最近一年使用:0次
名校
9 . 如图,四棱锥S—ABCD中,底面ABCD为菱形,
,侧面SAB⊥侧面SBC,M为AD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/3fdc73d9-b024-448b-9a60-36007ce46a17.png?resizew=242)
(1)求证:平面SMC⊥平面SBC;
(2)若AB与平面SBC成
角时,求二面角
的大小,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e802c1023c684f286ecfb38f1e47b0f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/3fdc73d9-b024-448b-9a60-36007ce46a17.png?resizew=242)
(1)求证:平面SMC⊥平面SBC;
(2)若AB与平面SBC成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d72f17779a02f405a5c534030728d03.png)
您最近一年使用:0次
2022-07-16更新
|
1671次组卷
|
4卷引用:重庆市西南大学附属中学2021-2022学年高一下学期期末数学试题
名校
解题方法
10 . 正方体
中,二面角
的平面角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf606fa4e3090df2ad3cd3b60c6f239.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-07-15更新
|
921次组卷
|
3卷引用:重庆市第七中学校2021-2022学年高一下学期期末数学试题