名校
1 . 如图,在四棱锥
中,
底面
,
,
,
,
.点E为棱
的中点,点F为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a21506a7-ec95-4041-8db8-d4058a39cd54.png?resizew=239)
(1)证明:
;
(2)求直线
与平面
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a21506a7-ec95-4041-8db8-d4058a39cd54.png?resizew=239)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c38bbe49284a2ceab26001ced8cfd56.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c4554df2d60bde7377c63aad1f0e7b.png)
您最近一年使用:0次
2022-11-20更新
|
436次组卷
|
2卷引用:黑龙江省大庆市肇州县第二中学2022-2023学年高三上学期第二次月考数学试题
名校
2 . 如图1,在边长为4的菱形
中,
,点
是
中点,将
沿
折起到
的位置,使
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/d7bef69d-9070-4fd5-880b-7e4165de7e41.png?resizew=328)
(1)求证:
平面
;
(2)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/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967bd1d8bd38f6be7931eef41db106.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/d7bef69d-9070-4fd5-880b-7e4165de7e41.png?resizew=328)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4525c00ed908bed8ba8d353e747a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2022-11-09更新
|
134次组卷
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2卷引用:黑龙江省齐齐哈尔市普高联谊校2022-2023学年高二上学期期中数学试题
解题方法
3 . 已知正方体
的棱长为
,点E为棱
上一动点,点F为棱
上一动点,且满足
,则三棱锥
体积取最大值时,则三棱锥
外接球的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d10411322534b9d2cc1d43f0aff9e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d10411322534b9d2cc1d43f0aff9e96.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/2aea8148-4688-4fa9-a098-1d71e8037bf3.png?resizew=179)
您最近一年使用:0次
2022-11-06更新
|
468次组卷
|
5卷引用:黑龙江省齐齐哈尔市八校联合体2022-2023学年高三上学期期中考试数学试题
黑龙江省齐齐哈尔市八校联合体2022-2023学年高三上学期期中考试数学试题黑龙江省哈尔滨市宾县第二中学2022-2023学年高三上学期期中考试数学试题云南省德宏州2023届高三上学期期末教学质量统一监测数学试题(已下线)8.3.2 圆柱、圆锥、圆台、球表面积和体积(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)(已下线)专题训练:与球有关的外接和相切问题-【题型分类归纳】
名校
4 . 如图,在三棱柱
中,
平面
,
,
,且
为线段
的中点,连接
,
,
.
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb531a063e0e3204b97f679bc1352a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f752d8a27ed612c37ddc86e8b483a243.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85cf614ec297dd2183e65a42a4618b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
您最近一年使用:0次
2022-11-05更新
|
517次组卷
|
7卷引用:黑龙江省大庆市肇州县第二中学2022-2023学年高二上学期第二次月考数学试题
黑龙江省大庆市肇州县第二中学2022-2023学年高二上学期第二次月考数学试题浙江省杭州第二中学2022-2023学年高二上学期期中数学试题浙江省杭州第二中学2022-2023学年高二上学期期中数学试题B卷(已下线)高中数学-高二上-54广东省兴宁市沐彬中学2022-2023学年高二上学期第二次月考数学试题(已下线)期中真题必刷基础60题(47个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)浙江省武义第一中学2023-2024学年高二上学期11月检测1数学试题
名校
解题方法
5 . 下列说法正确的是( )
A.已知![]() ![]() ![]() |
B.若向量![]() ![]() |
C.若![]() ![]() ![]() |
D.在三棱锥![]() ![]() ![]() |
您最近一年使用:0次
2022-10-26更新
|
428次组卷
|
2卷引用:黑龙江省大庆铁人中学2022-2023学年高二上学期第一次月考数学试题
解题方法
6 . 如图所示,在四棱锥P-ABCD中,
,且
,若
,
,则平面APB与平面PBC夹角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e59f4730024710b00230d6179cb6837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee871f91a4ed3c4a9d54a6854c50431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9cef4d65a9f812c10abec698a64953.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/3622bb4f-eadf-424d-802d-e08b3ba233c9.png?resizew=157)
您最近一年使用:0次
名校
解题方法
7 . 在多面体
中,平面
平面
,
是面积为
的矩形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/5a453ae3-86db-4893-96a4-791a3d9227bb.png?resizew=207)
(1)求证:
;
(2)求点
,到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119ccb9a7d6b4fec47daafe14a2d5a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ac83c24f78b152bfcc783786c01cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1e2c273d6413383af978b52b1cd64f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba8f8a48c8da8296e65a2d0ccac62d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7f01bff77da64e08e365b51dc5d9dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b82fa8f506f8099ca06c36c706db479.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/5a453ae3-86db-4893-96a4-791a3d9227bb.png?resizew=207)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbebd9f39c781268d6c523b8f433fc6.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
您最近一年使用:0次
名校
8 . 如图,在平面四边形
中,
,
,且
,以
为折痕把
和
向上折起,使点A到达点E的位置,点C到达点F的位置(E,F不重合).
![](https://img.xkw.com/dksih/QBM/2022/10/15/3088420423360512/3094183877058560/STEM/953c8464ed13466d8222c7276114ade3.png?resizew=297)
(1)求证:
;
(2)若平面
平面FBD,点G为
的重心,
平面ABD,且直线EF与平面FBD所成角为60°,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974e32fac0b8857d855464877fa071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc73a32a9c53743ea69d2cc053bce74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c419c59e84ff9a14f86761893b56e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe70c6135cb07a6c93b274322ee3833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f923edfaa4032757d8a8e65ddda236.png)
![](https://img.xkw.com/dksih/QBM/2022/10/15/3088420423360512/3094183877058560/STEM/953c8464ed13466d8222c7276114ade3.png?resizew=297)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b810d861639a51301b15edef0c29f2.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87efa782d2cde5cb35c28a3b80bc5a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe70c6135cb07a6c93b274322ee3833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be7ec67c252f349fe8c35bc6a2be537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1671565f167abe03cc0c4dd16b86d2.png)
您最近一年使用:0次
2022-10-24更新
|
547次组卷
|
3卷引用:黑龙江省哈尔滨市第三中学校2022-2023学年高二上学期第二次验收考试数学试题
名校
解题方法
9 . 已知在边长为6的菱形
中,
,点
分别是线段
上的点,且
.将四边形
沿
翻折,当折起后得到的几何体
的体积最大时,下列说法其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc073618b001c7862a69d4087a7ca72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9b6bb1f3e46026af863b2b269ecf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fe060a37a93ea736e9c3d444809cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82cc1446aa0a94fe513522477b36444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b4f656690ba016c6d31b69126c6646.png)
A.![]() | B.![]() ![]() |
C.平面![]() ![]() | D.平面![]() ![]() |
您最近一年使用:0次
2022-10-23更新
|
244次组卷
|
2卷引用:黑龙江省鹤岗市第一中学2022-2023学年高三上学期10月月考数学试题
名校
解题方法
10 . 已知四棱锥
中,平面
底面ABCD,
是等边三角形,底面ABCD是菱形,且
,M为棱PD的中点,则下列结论不正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db3940f180ba6947c2edcfaf4431e42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a13c39ce0233e097dd6da8437a6957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51000f9675f0eeec6a1ae4e893769c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969b2e7165ea7fe138260b4753c47517.png)
A.![]() | B.![]() |
C.![]() | D.PB与AM所成角的余弦值为![]() |
您最近一年使用:0次
2022-10-23更新
|
391次组卷
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2卷引用:黑龙江省鹤岗市第一中学2022-2023学年高三上学期10月月考数学试题