名校
1 . 如图,在四棱锥
中,底面
是等腰梯形,
,侧面
平面
,
,
,
为
的中点.
(1)证明:
平面
;
(2)点
在棱
上,直线
与平面
所成的角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70e550fa3c5aaf1b9c28f36fd5ed5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77c16357eabed95d85bbd4e3dada92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/f371ba93-80ea-4449-aaea-b02b100c3d14.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241a37fb1eff68a7133822b1b52d627e.png)
您最近一年使用:0次
2024·全国·模拟预测
名校
2 . 如图,P为圆锥的顶点,O为圆锥底面的圆心,AB为底面直径,四边形POBC是梯形,且
,
,
,D为圆O上一点.
(1)若点M在线段AD上,且
,求证:
∥平面CDB;
(2)当直线PD与平面PAB所成的角为30°时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061248f4e3932ad43c1abd52ada56a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b93b8e3f2196f571782a283f2e10ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3530ee12bd68b53970b83f28985b31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/b1f43728-6dfd-4cfb-9393-8828e4fb8ffa.png?resizew=168)
(1)若点M在线段AD上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963f0cda34e54f15725cee9448a4537e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
(2)当直线PD与平面PAB所成的角为30°时,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6a0cee8226e82cc57916e10d533369.png)
您最近一年使用:0次
名校
解题方法
3 . 如图正方体
的棱长为4,点M是棱
的中点,点P在面
内(包含边界),且
,则下列四个命题中:
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903564803244032/2938839180140544/STEM/1449dfd91d1848379d24787a95b2701f.png?resizew=156)
①点
的轨迹的长度为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
②存在
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a53ed1ecd56f1d951001c111cb1563.png)
③直线
与平面
所成角的正弦值最大为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
④沿线段
的轨迹将正方体
切割成两部分,挖去体积较小部分,剩余部分几何体的表面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74be65f77a725cbed17ba0a310033352.png)
其中正确命题的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce932cc5e92720f4ae35492c2f1a068.png)
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903564803244032/2938839180140544/STEM/1449dfd91d1848379d24787a95b2701f.png?resizew=156)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a53ed1ecd56f1d951001c111cb1563.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
④沿线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74be65f77a725cbed17ba0a310033352.png)
其中正确命题的序号是
您最近一年使用:0次
名校
解题方法
4 . 如图的多面体是由一个直四棱柱被平面
所截后得到的,其中
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e493f410-b042-4fbc-9f2f-895e96e88793.png?resizew=191)
(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/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08a6cc0572f4eee8231684be027d6c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e493f410-b042-4fbc-9f2f-895e96e88793.png?resizew=191)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d0567ee284567a5d42b3c0b95083ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb58ca76c1fb28b4cb408bb9897b70a1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
您最近一年使用:0次
2022-02-21更新
|
439次组卷
|
3卷引用:宁夏石嘴山市第三中学2023届高三上学期期末考试数学(理)试题
宁夏石嘴山市第三中学2023届高三上学期期末考试数学(理)试题云南省保山市2022届高三第一次教学质量监测数学(理)试题(已下线)重难点03 立体几何与空间向量-2022年高考数学【热点·重点·难点】专练(全国通用)
名校
解题方法
5 . 已知四棱柱ABCD﹣A1B1C1D1的底面是边长为2的菱形,且∠BAD=
,AA1⊥平面ABCD,
,设E为CD的中点.
(1)求证:D1E⊥平面BEC1;
(2)点
在线段A1B1上,且AF∥平面BEC1,求平面ADF和平面BEC1所成锐角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bbaa1516ed924a27d7b5cbf81ebba4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/e0bf0eff-bfdb-4f74-ac99-c71cb194a1d5.png?resizew=164)
(1)求证:D1E⊥平面BEC1;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在多面体
中,四边形
是边长为2的正方形,四边形
是直角梯形,其中
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/d236d0d6-1af9-45b6-b1e0-aed7c923d28f.png?resizew=176)
(1)证明:平面
平面
.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e89556992cbfd7043330ac7421d342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b405a122ded2eb0395d5434892ae7b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c766942d554e7f15ffec6eaacbe0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab362e74e7f9e8a03816dd7b5aff6a1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/d236d0d6-1af9-45b6-b1e0-aed7c923d28f.png?resizew=176)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c539709f3b8449ef9cd00a86e194c099.png)
您最近一年使用:0次
2021-03-05更新
|
827次组卷
|
9卷引用:宁夏六盘山高级中学2023届高三上学期期末考试数学(理)试题
解题方法
7 . 如图,正方形
与梯形
所在的平面互相垂直,
,
∥
,
,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/2021/1/31/2648172071583744/2649465225551872/STEM/a740b46fdf854cbd8b247e99bdd4f813.png?resizew=302)
(1)当点
为
中点时,求证:
∥平面
;
(2)当平面
与平面
所成锐二面角的余弦值为
时,求点M在线段EC上的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c313dff515240bc75d42f6687ac44cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/2021/1/31/2648172071583744/2649465225551872/STEM/a740b46fdf854cbd8b247e99bdd4f813.png?resizew=302)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
(2)当平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱锥
中,底面
为直角梯形,
,
,平面
底面
,
为
的中点,
是棱
上的点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/48777381-a43e-4194-a730-45264c319fa4.png?resizew=231)
(1)证明:平面
平面
;
(2)若
,求锐二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccbff99696256fd402a2efb371862c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ff6d7dd48b57f03d82d2c522ee9b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac14dc6acbe6fd959ea52a3ad489879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5729dd997ea7e8cb4cef8b7165b36e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/48777381-a43e-4194-a730-45264c319fa4.png?resizew=231)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902c0a89471f47e05e25277e4a5196e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df8274c0338a000e4992e31afe850e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864689852707154e3a9be79f657f16d4.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,在三棱柱
中,侧棱垂直于底面,
,
,
,
.点
在侧棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/6827a2b2-b3f4-4f11-a755-a7b8286a3c1c.png?resizew=152)
(1)求证:
平面
;
(2)设
为
的中点,求直线
与平面
所成角的正弦.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32778bb52afe4f2b345e9836c54e3c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/6827a2b2-b3f4-4f11-a755-a7b8286a3c1c.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
您最近一年使用:0次
2021-01-09更新
|
210次组卷
|
2卷引用:宁夏平罗中学2021届高三上学期期末考试数学(理)试题
10 . 如图(1),已知梯形
,
,
,
,将
沿
向上翻折,构成如图(2)所示的四棱锥
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624859004608512/2632267762065408/STEM/3e307187-6be7-47d0-993a-4e4fab64171f.png?resizew=422)
(1)证明:
平面
;
(2)当四棱锥体积最大时,若二面角
的余弦值为
,求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15164f8cfc92ef0bff64cc07d9116cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e98920101c174b991d7a8481707ab88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624859004608512/2632267762065408/STEM/3e307187-6be7-47d0-993a-4e4fab64171f.png?resizew=422)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0684e0b09b04661c602437982c0397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(2)当四棱锥体积最大时,若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48ca51b0c3fbf5d5624ea08b916e59a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
您最近一年使用:0次
2021-01-09更新
|
190次组卷
|
2卷引用:宁夏贺兰县景博中学2021届高三期末数学(理)试题