1 . 已知四棱锥
的底面ABCD为梯形,
,
,
,
,
为正三角形,平面
平面ABCD,E,F分别为PA,PB的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e0b7d845cbceccd3e76ca461fcc534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
A.![]() ![]() |
B.PD与平面ABCD所成角的正弦值为![]() |
C.![]() |
D.四棱锥![]() ![]() |
您最近一年使用:0次
名校
2 . 如图,已知正方体
的棱长为2,点E是
内(包括边界)的动点,则下列结论中正确的序号是________ (填所有正确结论的序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/7e11cc65-4391-4ccf-a3fb-a5d662976513.png?resizew=170)
①若
,
,则
平面
;
②若平面
与正方体各个面都相交,且
,则截面多边形的周长一定为
;
③若
的角平分线交AB于点F,且
,则动点E的轨迹长为
;
④直线
与平面
所成的角的余弦值的最大值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/7e11cc65-4391-4ccf-a3fb-a5d662976513.png?resizew=170)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a64f1d0b5e4a6ebf4405b98a21a1ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44edb46eb17d224e0d9a2667c2e5df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
②若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77bc6a7e1ace458b04b99247bca0accd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec978eb43bc4f9e7df83b0d0195dcda.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f31a3724c639f88486f8356ca65397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06beac41f26a7735bbeff2e7df52f51d.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
您最近一年使用:0次
2023-04-25更新
|
445次组卷
|
2卷引用:四川省泸县第五中学2023届高考适应性考试数学(理)试题
名校
解题方法
3 . 如图,在四棱锥
中,
底面ABCD,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/8282d6bb-17f2-4d42-a68e-53430882cf9f.png?resizew=140)
(1)证明:平面
平面PAC;
(2)求AD与平面PCD所成角的正弦值.
![](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/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2753753faf2cb9a0003aa8e3945159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/8282d6bb-17f2-4d42-a68e-53430882cf9f.png?resizew=140)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
(2)求AD与平面PCD所成角的正弦值.
您最近一年使用:0次
2023-03-29更新
|
621次组卷
|
2卷引用:四川省泸县第一中学2023届高考适应性考试数学(文)试题
名校
4 . 已知矩形
,
,
为
的中点,现分别沿
,
将
和
翻折,使点
重合,记为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/1c617da6-4779-4835-a520-9244b2f02912.png?resizew=184)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c914e0925b4c1aec3d1caa30d7841dda.png)
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fd84be14fab79b8669b05cba17790a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366f51d41a3989f78882fb1358fa6119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/1c617da6-4779-4835-a520-9244b2f02912.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c914e0925b4c1aec3d1caa30d7841dda.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5757f787d98f9a46777324b69ad672.png)
您最近一年使用:0次
2023-03-23更新
|
2056次组卷
|
8卷引用:四川省宜宾市叙州区第一中学校2023届高三三诊模拟考试数学(理)试题
四川省宜宾市叙州区第一中学校2023届高三三诊模拟考试数学(理)试题江苏省新高考2023届高三下学期二模模拟数学试题(已下线)专题13 押全国卷(文科)第18题 立体几何(已下线)专题14 押全国卷(理科)第18题 立体几何(已下线)押新高考第20题 立体几何专题16空间向量与立体几何(解答题)(已下线)专题10 空间角、距离的计算-期中期末考点大串讲(苏教版2019必修第二册)(已下线)2023年高考全国甲卷数学(理)真题变式题16-20
5 . 如图,在直三棱柱
中,点
分别是
中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/5f430fbc-0dcc-482d-91b6-a338249679b0.png?resizew=151)
(1)证明:
;
(2)若
,平面
平面
,求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfb9c088a7422e95f747701a626513d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3baf3a2932ce8811305b3fbde10b514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cfb0e8784dcd61aa951601837c7a77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/5f430fbc-0dcc-482d-91b6-a338249679b0.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea23400f38c34260fc327633123a0d2a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8def8f7114c3441001002081b2430d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
6 . 如图,正方形
中,
分别是
的中点,将
分别沿
折起,使
两点重合于点
,过
作
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/928d3da2-1bfb-4042-bb41-e73c88fc6ce9.png?resizew=324)
(1)证明:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d4d5391fc7b4cd21e9e29e56ded358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c818110255bdad691f61be6461a6fd73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294e920268f22ddb77c914f113951225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/928d3da2-1bfb-4042-bb41-e73c88fc6ce9.png?resizew=324)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17622ea6f6f5afd1ad817a557e5889d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425bb0d1c21eb4448dbbe9a41efa7538.png)
您最近一年使用:0次
名校
解题方法
7 . 《九章算术》中关于“刍童”(上、下底面均为矩形的棱台)体积计算的注释:将上底面的长乘以二与下底面的长相加,再与上底面的宽相乘,将下底面的长乘以二与上底面的长相加,再与下底面的宽相乘,把这两个数值相加,与高相乘,再取其六分之一.现有“刍童”
,其上、下底面均为正方形,若
,且每条侧棱与底面所成角的正切值均为
,则该“刍童”的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a0c3a4e61b97fa9bc58f3179fc2958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b530f14ecc918db178e78a049b36239b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2fdf1944afebb51cb6a5e6c74aadd.png)
A.224 | B.448 | C.![]() | D.147 |
您最近一年使用:0次
2023-03-02更新
|
2215次组卷
|
8卷引用:四川省泸州市2023届高三下学期第二次教学质量诊断性考试数学(文科)试题
解题方法
8 . 在正四棱柱
中,
是
的中点,
,
,则
与平面
所成角的正弦值为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab527e1b5f124429b532804ef3f870f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
您最近一年使用:0次
2023-02-14更新
|
712次组卷
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8卷引用:四川省营山县第二中学2023届高三第六次高考模拟检测数学(文科)试题
四川省营山县第二中学2023届高三第六次高考模拟检测数学(文科)试题四川省营山县第二中学2023届高三第六次高考模拟检测数学(理科)试题四川省部分学校2022-2023学年高三下学期大联考理科数学试题四川省部分学校2022-2023学年高三下学期2月大联考文科数学试题四川省成都市郫都区2022-2023学年高一下学期期末数学试题(已下线)专题7-2 立体几何压轴小题:角度与动点、体积(讲+练)-3(已下线)专题8.12 空间直线、平面的垂直(一)(重难点题型检测)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)河南省南阳市南召县2022-2023学年高一下学期期末数学试题
9 . 如图,在正方体
中,
为棱
的中点,
是正方形
内部(含边界)的一个动点,且
平面
.给出下列四个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/cdcc326d-298b-409e-861e-5785536989b8.png?resizew=161)
①动点
的轨迹是一段圆弧;
②存在符合条件的点
,使得
;
③三棱锥
的体积的最大值为
;
④设直线
与平面
所成角为
,则
的取值范围是
.
其中所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6293a2528570eda7fef7c784efc7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1df970d8b2fcbb38bfac1dc33da9179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/cdcc326d-298b-409e-861e-5785536989b8.png?resizew=161)
①动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
②存在符合条件的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fc86f0edd9477df7540a1d0b1a309c.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e901763c0c5723616c6cc491657c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
④设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc24d605ad707ad0e76059d8a31f50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89d3cb58df77b34628cc290b2c91fbb.png)
其中所有正确结论的序号是
您最近一年使用:0次
2023-01-07更新
|
920次组卷
|
4卷引用:四川省成都市玉林中学2023届高三二诊模拟理科数学试题(二)
10 . 如图三棱柱
中,
为正三角形,且
平面
分别是棱
的中点,记
与平面
所成的角为
,二面角
的平面角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/c08c4c22-72ab-41b0-ba35-3ab1d45485d5.png?resizew=177)
(1)求证:
;
(2)判断
与
的大小,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4733824815ffc32ef3eb3d0d75465af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6d32bd63aae6c20ee5ddfdc6ae370e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47342449ca1a78a7550975a7589003c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/c08c4c22-72ab-41b0-ba35-3ab1d45485d5.png?resizew=177)
(1)求证:
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(2)判断
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