名校
1 . 如图:正三棱柱
的底面边长为
,
是
延长线上一点,且
,二面角
的大小为
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9a97e125-da05-422e-9a62-adf961a0715b.png?resizew=252)
(1)求点
到平面
的距离;
(2)若
是线段
上的一点 ,且
,在线段
上是否存在一点
,使直线
平面
? 若存在,请指出这一点的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49fe1d9f256f5c48242e827cf7dcd79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c34f1c900792fb9fadded8982d6d042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9a97e125-da05-422e-9a62-adf961a0715b.png?resizew=252)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb87785b2842459c59b2571aac7374b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da80ce9dfc5ac06d2fe7b2a0a37b54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd583b535da16680a42d7553f7d29d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c203fa3cafdc1d924b61ee1d83a3ecf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db36ca841db6abbdd234902fc2e32c7.png)
您最近一年使用:0次
名校
2 . 在矩形
中,
,
,沿对角线
把矩形折成二面角
的平面角为
时,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b0c298f06cbc909a3b06d04d354b7b.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b0c298f06cbc909a3b06d04d354b7b.png)
您最近一年使用:0次
2019-04-13更新
|
1061次组卷
|
4卷引用:【全国百强校】江西省临川第一中学2018-2019学年高二下学期第二次月考数学(理)试题
名校
3 . 如图所示,四棱锥
中,
平面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/38e8152a-f606-41e1-b556-1809263445dc.png?resizew=173)
(1)证明:
平面
;
(2)设二面角
为
,
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c9a6255f54f395572a922c801aa490.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/2023/1/5/38e8152a-f606-41e1-b556-1809263445dc.png?resizew=173)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a955954cd1b57f194bb8f199f66cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03a08e6ea74ee085ed9dd4a05af94c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98823cbc09ca52df1fbcc446eba3e44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2019-03-30更新
|
568次组卷
|
2卷引用:江西省临川第一中学2018-2019学年高二下学期期中数学(理)试题
4 . 如图(1),等腰
中,
,
,以
边上的中线
为折痕,将
沿
折起,构成二面角
,在平面
内作
,且
,连
,
,
,如图(2)所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/29a48fe7-52fc-4111-a26d-b5220c6a8dde.png?resizew=341)
(1)求证:
平面
;
(2)如果二面角
为直二面角,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](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/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6d946ec5bc75341f7e5fe400054464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/29a48fe7-52fc-4111-a26d-b5220c6a8dde.png?resizew=341)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544381069cb72bed5598ca5adc45ae26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)如果二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001a1ffb477e4fde288a68618803b0e3.png)
您最近一年使用:0次
2019-02-10更新
|
584次组卷
|
2卷引用:江西省临川第一中学2018-2019学年高二上学期期末考试数学(理)试题
5 . 如图,平面
平面
,其中
为矩形,
为梯形,
,
,
.
(Ⅰ)求证:
平面
;
(Ⅱ)若二面角
的平面角的余弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a1bc70c63721775ce86dfe09d6dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b594b8a837a09146b1a53c8f0ed20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a34a1a0354e836d4c88eeb7d2589283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b594b8a837a09146b1a53c8f0ed20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490cc46da53e8fdc047cd1dd801a2cb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ec7d8511542c3a819a7e8b284f3172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d654bf29542a7d899ae3ebbee26c2e.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33cae0eeba31996058e6b571d488e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4292ecfe951c059afe844da857d83fa4.png)
(Ⅱ)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f463aa00ad218d25a1fd25bd081d4b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f13f113c5e4bdfeb80d5d0a8dcbf77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf6101c529b7868bc1c2fd46aca16bc.png)
![](https://img.xkw.com/dksih/QBM/2018/10/8/2049057876336640/2051386390396928/STEM/97065211c7b443e5907b76349e7893a9.png?resizew=133)
您最近一年使用:0次
2018-10-11更新
|
586次组卷
|
4卷引用:【全国百强校】江西省抚州市临川区第一中学2017-2018学年高二下学期期末考试数学(理)试题
名校
6 . 如图,直线
平面
,直线
平行四边形
,四棱锥
的顶点
在平面
上,
,
,
,
,
分别是
与
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/e765b6e1-9cb1-43ee-ad55-e75f8c379dbd.png?resizew=167)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ddcfd8985d6ef923063a301e2bc5ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ddcfd8985d6ef923063a301e2bc5ab.png)
![](https://img.xkw.com/dksih/QBM/2018/12/16/2098171757223936/2100038543417344/STEM/9cd13391622c46098637266d950d55f2.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2018/12/16/2098171757223936/2100038543417344/STEM/feaa8e90cba343ad9b478ced8d345b3f.png?resizew=73)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba56b41fe702d9b6433e4d01e48d69a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606c6e9fb76e8cab206af9bfd3030dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1691bcf2ce37aec3970e59b4bf2281ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/e765b6e1-9cb1-43ee-ad55-e75f8c379dbd.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad066a37dad954374e3fdcd687be9f1f.png)
您最近一年使用:0次
2018-09-13更新
|
1081次组卷
|
5卷引用:江西省临川第一中学、临川一中实验学校2019-2020学年高二上学期期中考试数学(理)试题
名校
7 . 如图,在多面体
,底面
是菱形,
,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2018/3/3/1894140251406336/1895794564702208/STEM/9f96b2f6ab7b4f379927af73dffcddf4.png?resizew=124)
(1)求证:
;
(2)求平面
与平面
所成锐角二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106e6c5e9736808311e5154991f3beee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4e574c9d139615d991a168cfbf63b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6754f5c421ea86c1f87a811f9ae9fc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6960fc569cc3361cce0ecc37d2ffc75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5b6b0c2fb98ae4777c33ccef8a2c1.png)
![](https://img.xkw.com/dksih/QBM/2018/3/3/1894140251406336/1895794564702208/STEM/9f96b2f6ab7b4f379927af73dffcddf4.png?resizew=124)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828247a3338571cb0d4ba2a5bf88929c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259962b724adf07a2047f91f37b5f1b7.png)
您最近一年使用:0次
2018-03-05更新
|
328次组卷
|
2卷引用:江西省抚州市临川区第一中学2017-2018学年高二下学期期中考试数学(理)试题
名校
解题方法
8 . 如图,在直角梯形
中
,
,
,
是
的中点,将
沿
折起,使得
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/46454bce-9ac2-42b8-b40c-2f6db208a179.png?resizew=299)
(1)求证:平面
平面
;
(2)若
在
上且二面角
所成的角的余弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb4347d43df28c6658900c7c6b3f746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d57b7645167340eaeaeeb5962bbce2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c0e570a0c3d2ea8714441d177126c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/46454bce-9ac2-42b8-b40c-2f6db208a179.png?resizew=299)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d682fd0344452998187cb6d48de3dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
您最近一年使用:0次
真题
名校
9 . 如图,四边形ABCD为正方形,PD⊥平面ABCD,PD∥QA,QA=AB=
PD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/bf28fcb3-7088-45ba-b8a8-223a2bc06905.png?resizew=207)
(I)证明:平面PQC⊥平面DCQ
(II)求二面角Q-BP-C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/bf28fcb3-7088-45ba-b8a8-223a2bc06905.png?resizew=207)
(I)证明:平面PQC⊥平面DCQ
(II)求二面角Q-BP-C的余弦值.
您最近一年使用:0次
2019-01-30更新
|
2654次组卷
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13卷引用:2016-2017学年江西崇仁县二中高二上期中数学(理)试卷
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解题方法
10 . 平面
的一个法向量
,则
轴与平面
所成的角的大小为( )
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3卷引用:2016-2017学年江西崇仁县二中高二上期中数学(理)试卷
2016-2017学年江西崇仁县二中高二上期中数学(理)试卷第3章 空间向量与立体几何测试题 -2021-2022学年高二上学期数学北师大版(2019)选择性必修第一册(已下线)模块一 专题2 B 空间向量的应用提升卷 期末终极研习室高二人教A版