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1 . 如图,已知
分别为四面体
的面
与面
的重心,
为
上一点,且
.设
.
(1)请用
表示
;
(2)求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905943d59ef17fdb1d29b626b0847d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb0493ebe599f2bc513e63e908bfd45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/25/98a3a9cf-687c-4a6e-b67e-ee4f9fa8ba54.png?resizew=167)
(1)请用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed18a92338c7578c18a5ba3a2ae1ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350f162ee9aa08f4c9779481a5ef1025.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b772d03da5f597caaf8ab796e564b7d.png)
您最近一年使用:0次
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2 . 如图,正方体
的棱长为4,点
为棱
的中点,
分别为棱
,
上的点,且
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/e6f01387-f793-4fea-bd32-a24fc13fde01.png?resizew=163)
(1)求证:
平面
;
(2)求证:四边形
为平行四边形,并计算其面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617ca68c2f2268c8a04f208dbfda2de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/e6f01387-f793-4fea-bd32-a24fc13fde01.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6f470eec1a4c20378bdc575736949b.png)
您最近一年使用:0次
23-24高二上·上海·课后作业
解题方法
3 . 如图,在直三棱柱
中,
,
,棱
,点
、
分别是
、
的中点.建立适当的空间直角坐标系,解决如下问题:
(1)求
的模;
(2)求
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae445b17e686495b7ef5783c83c96410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4acc5d21a7490e6bed2453cc5147c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/14/4a12667b-b2bc-4aea-b5c7-4068e55ddf8f.png?resizew=105)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350f162ee9aa08f4c9779481a5ef1025.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8732e96e02aa9a706af3f0dc4c6796.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b201f1e798eb74963b98f2b0da4132.png)
您最近一年使用:0次
23-24高二上·上海·课后作业
4 . 在空间四面体
中,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
您最近一年使用:0次
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解题方法
5 . 教材44页第17题:在空间直角坐标系中,已知向量
,点
,点
.(1)若直线l经过点
,且以
为方向向量,P是直线l上的任意一点,求证:
;(2)若平面
经过点
,且以
为法向量,P是平面
内的任意一点,求证:
.利用教材给出的材料,解决下面的问题:已知平面
的方程为
,直线
是平面
与
的交线,则直线
与平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448381ad5527aa15c9e69a049fc8c09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c832b5312310a88bef6596496df8daa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b82ad92798b264062c062f4a9a1a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4733a43364bdf78f59757c8f8c3fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f0582d9908f92f14cb02a6ccaf0eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4733a43364bdf78f59757c8f8c3fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b523a8c1993478f6599680dc3b3dc45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa144c27f1deb376ce3ef53c1a86a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b818e1793be8d9213e903e5224987a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2888abfda58ff7563b34102d4d736d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-11-14更新
|
433次组卷
|
2卷引用:浙江省绍兴市第一中学2023-2024学年高二上学期期中数学试题
6 . 如图所示,已知斜三棱柱
中,
,在
上和
上分别有一点M和N,且
,其中
.求证:
,
,
共面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7daa303125d656565a0047cfdfe65d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ae28f67e6f7346744ba73193e00b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca31c862890af181c5603111a77c970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014dff8997c661055229de29c61cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/38472757-e0ed-46c6-be59-87bd32db3fe6.png?resizew=157)
您最近一年使用:0次
2023-09-17更新
|
132次组卷
|
2卷引用:人教B版(2019)选择性必修第一册课本例题1.1.2 空间向量基本定理
7 . 如图,在平行六面体
中,底面四边形
是边长为2的菱形,且
.
(1)求证:面
面
;
(2)当
为何值时,直线
与平面
所成的角的正弦值为
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/13289e53-777d-42ac-962e-498b70d20860.png?resizew=203)
(1)求证:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
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8 . 如图,在四面体
中,底面ABC是边长为1的正三角形,
,点P在底面ABC上的射影为H,
,二面角
的正切值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/b163ccc3-5d33-4632-973d-143b3937f0da.png?resizew=146)
(1)求证:
;
(2)求异面直线PC与AB所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d975f472e1663622e2b7629a3f5ff95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97145e11dfb0e127164187f11288e6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f7a0ab16cbb95691b3d80334a91401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/b163ccc3-5d33-4632-973d-143b3937f0da.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)求异面直线PC与AB所成角的余弦值.
您最近一年使用:0次
解题方法
9 . 如图,在平行六面体
中,
,
,
分别在
,
,
上,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/062ed575-f8b4-4925-9160-71f9aaca259e.png?resizew=218)
(1)求证:
;
(2)若底面
,侧面
都是正方形,且二面角
的大小为120°,
,若
是
的中点,求
的长度.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1586681cc763024b659b07dc4ccd02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fe19c35d4797ea04374c89ee02f50a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6588678fefd6cc4aff670e5dea92376c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/062ed575-f8b4-4925-9160-71f9aaca259e.png?resizew=218)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31053dbf6775b0a983eeea10b4acddfc.png)
(2)若底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ebcc4aa98d46366df48f751a5f368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1716ca1425c46de840747e089efd43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec5bd77cfc1313bc200480cc66c766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
名校
10 . 已知
是空间的一个基底,且
,
,
,
.
(1)求证:
,
,
,
四点共面;
(2)
能否作为空间的一个基底?若能,试用这一基底表示
;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5401d7f4a297c8b097e74bdebaaa8570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c854abb7eb1bb8e09433eb6f22dc70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64be8f8016561b63843c72977eba7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee7443cc42d784c22523915501ad909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a492106de3a9a64755275e30ba16e0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639cdeadbc9e566f81d65a0506823b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
您最近一年使用:0次
2023-09-07更新
|
917次组卷
|
5卷引用:山西省金科大联考2023-2024学年高二上学期开学考试数学试题
山西省金科大联考2023-2024学年高二上学期开学考试数学试题四川省成都市新津区成外学校2023-2024学年高二上学期9月月考数学试题(已下线)高二上学期期中复习【第一章 空间向量与立体几何】十大题型归纳(拔尖篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)广东省广州市第八十九中学2023-2024学年高二上学期10月月考数学试题(已下线)模块四 专题4 大题分类练 《空间向量与立体几何》基础夯实练