如图所示,在直三棱柱
中,侧面
为长方形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6afb196e-ab2b-4f9f-b32d-2f579036adc4.png?resizew=151)
(1)求证:平面
平面
;
(2)求直线
和平面
所成角的正弦值;
(3)在线段
上是否存在一点T,使得点T到直线
的距离是
,若存在求
的长,不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aedf65d7d930fdb972d4802c0dea8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e386961ae92ae80a926b593ebde601.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6afb196e-ab2b-4f9f-b32d-2f579036adc4.png?resizew=151)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9921c943a00c97ef3a429c913538be12.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9921c943a00c97ef3a429c913538be12.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2cda9e5690d90d24c318895db59a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc627e8a6320ed55914c49e867c5fc32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b619f3d52e485c547379f4b3e92f4db.png)
21-22高三上·天津河西·阶段练习 查看更多[7]
天津市第四中学2021-2022学年高三上学期第二次阶段性质量调查数学试题(已下线)解密12 空间向量在空间几何体的应用(讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)天津市第四十七中学2022届高三下学期学业能力调研数学试题(已下线)第25节 直线、平面垂直的判定与性质-备战2023年高考数学一轮复习考点帮(全国通用)第一章 空间向量与立体几何章末检测(能力篇)(已下线)第1章 空间向量与立体几何单元测试基础卷-2023-2024学年高二上学期数学人教A版(2019)选择性必修第一册(已下线)第二章 立体几何中的计算 专题二 空间距离 微点1 两点间的距离、点到直线的距离【基础版】
更新时间:2022-01-12 13:37:01
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解答题-问答题
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【推荐1】已知四棱锥P﹣ABCD的底面为直角梯形,AB∥DC,∠DAB=90°,PA⊥底面ABCD,且PA=AD=DC=1,AB=2,M是PB的中点.
(Ⅰ)证明:面PAD⊥面PCD;
(Ⅱ)求直线AC与PB所成角的余弦值;
(III)求面
与面
所成二面角的余弦值.
(Ⅰ)证明:面PAD⊥面PCD;
(Ⅱ)求直线AC与PB所成角的余弦值;
(III)求面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c5ef850e256c98ca4f033999e61311.png)
![](https://img.xkw.com/dksih/QBM/2012/1/11/1570684119769088/1570684125216768/STEM/a9f31976be134b0b9de0c78c3151ec92.png?resizew=233)
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【推荐2】如图一,等腰梯形
,
,
,
,
分别是
的两个三等分点,若把等腰梯形沿虚线
,
折起,使得点
和点
重合,记为点
,如图二.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/b5536bdd-032c-4350-9295-d59b6e1893bb.png?resizew=289)
(1)求证:平面
平面
.
(2)求四棱锥P-ABEF的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/b5536bdd-032c-4350-9295-d59b6e1893bb.png?resizew=289)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f020ca4ad44801691235958e253907d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
(2)求四棱锥P-ABEF的表面积.
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【推荐1】如图,在四棱锥
中,平面
底面
,
是平行四边形,
为等边三角形,点E为
的中点,点F为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/12/4/2869399743356928/2894463681880064/STEM/fd24a09414504e549c0156eeaca51bb7.png?resizew=222)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65997b09d0cb2d4a7e46596c1a019e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1117de09f6a2d14452a7547e1bd82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://img.xkw.com/dksih/QBM/2021/12/4/2869399743356928/2894463681880064/STEM/fd24a09414504e549c0156eeaca51bb7.png?resizew=222)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dff8596941237ebea15de6798a183b.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da035673ef0edcfae6b72fb5e5ba34a.png)
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【推荐2】如图,四棱锥P-ABCD,M为棱PB上中点,底面ABCD是边长为2的菱形,PA=PC,PD=2,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/0c74f27b-54ac-434e-9165-fc30d171de3a.png?resizew=175)
(1)证明:
;
(2)若
,求AM与平面PCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fc703a74abf9a270eefe4d591ce574.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/0c74f27b-54ac-434e-9165-fc30d171de3a.png?resizew=175)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58bbc02479917ad761a24eaae0dbfd9.png)
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【推荐3】在底面
为梯形的多面体中.
,且四边形
为矩形.点
在线段
上.
是线段
中点时,求证:
平面
;
(2)是否存在点
,使得直线
与平面
所成的角为60°?若存在,求
.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b0b34a01bc5cf6f4cc60344cdd841a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f840eb15249668659ad58e7dd1ab6437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d987bcf7114c002843702100444da017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40cae1138ce408cf7ebbe14f152d6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159908a4653f69558772f93c2e3b039c.png)
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【推荐1】如图,在四棱锥
中,PA
平面ABCD,AD
CD,AD
BC,PA=AD=CD=2,BC=3.E为PD的中点,点F在PC上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/1b8f32a3-c702-4a86-bee2-a8a6dcf2beb5.png?resizew=168)
(1)求证:CD
平面PAD;
(2)求二面角
的余弦值;
(3)设点G在线段PB上,且直线AG在平面AEF内,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88454ace46996b99361d18e76189cdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/1b8f32a3-c702-4a86-bee2-a8a6dcf2beb5.png?resizew=168)
(1)求证:CD
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f2d3911679997fbf6f03df1e263f95.png)
(3)设点G在线段PB上,且直线AG在平面AEF内,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6729fb0c5e5e9549035590144b73144.png)
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【推荐2】已知,在四棱锥
中,
底面
,底面
为正方形,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/75b75f3e-f07f-4cc5-8478-b314746c0647.png?resizew=168)
(1)求证:
;
(2)在棱
上是否存在点
,使
?若存在,求BF的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee4b29c10915812f832ee29727e74f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/75b75f3e-f07f-4cc5-8478-b314746c0647.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3658c9637da0a83d05cccf33bec7e16.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
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