名校
1 . 如图,在三棱锥
中,D是
的中点,若
,
,
,则
等于____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c817835a4be974ec9de50d8f23ec06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cd14dfc0024459f9d8e594c95c5106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07dcf0b16163e0e0e0c0f248466ee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304a7f07db2ec637baadf8f0ab91c85c.png)
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2023-12-16更新
|
219次组卷
|
3卷引用:天津市滨海新区田家炳中学2023-2024学年高二上学期第二次月考数学试题
2 . 在正三棱锥
中,
是
的中心,
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a1bf1781683d2bff001a1a5f6fdfd1.png)
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3 . 在平行六面体
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf78c3119d4acaa96969c64fdf675be.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4f009f1bfbad036a6e8f023172f07b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779d66259687dfc726c1a1d64a4ad006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf78c3119d4acaa96969c64fdf675be.png)
您最近一年使用:0次
4 . 已知三棱锥
,点
满足:
,过点
作平面,与直线
,
,
分别相交于
三点,且
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdee64cdeccffd2bcd980b0d18aa0f9.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a954bcb09ab00779257bd6184390dea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7284ce20258f87ea183a3a4566db5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a5d2e3dcc5f09ee3ee522fe7965f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2a84deb55c137cacab8dabd60eb9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdee64cdeccffd2bcd980b0d18aa0f9.png)
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名校
5 . 在四面体
中,
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6523615f59be6afb9c85a8fd13986189.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e557d5e425910df34cc000101b25863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6523615f59be6afb9c85a8fd13986189.png)
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2023-11-19更新
|
318次组卷
|
5卷引用:山西省吕梁市2023-2024学年高二上学期11月期中数学试题
山西省吕梁市2023-2024学年高二上学期11月期中数学试题广东省珠海市第二中学2023-2024学年高二上学期第二次阶段考试数学试题黑龙江省哈尔滨市六校2023-2024学年高二上学期1月期末联考数学试题(已下线)专题11 空间向量及其运算10种常见考法归类(3)(已下线)6.1 空间向量及其运算(5)
6 . (6)已知空间中
两点,则
两点之间的距离公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c84a09595eabd6ae21a2e8faa7465c.png)
_______________
(7)在空间直角坐标系中,y轴上的点的坐标形式为___________
(8)向量加减法运算法则:加法三角形法则:首尾相连,首指向尾为和.
加法平行四边形法则:共起点的两边为邻边作平行四边形,共起点_________ 为和.
减法三角形:同起点,连终点,方向________ .
(9)共线向量基本定理:空间两个向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
共线的充要条件是存在唯一的实数
,使得__________ .通常把这个定理称为共线向量基本定理.
(10)数乘运算律:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294c0f85a47e8f5e004611af0bdd75a5.png)
_______________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a4ee3c424455ab04b1cf0acfb87d62.png)
____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3557f7de9f773172e5cd05574e958cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c84a09595eabd6ae21a2e8faa7465c.png)
(7)在空间直角坐标系中,y轴上的点的坐标形式为
(8)向量加减法运算法则:加法三角形法则:首尾相连,首指向尾为和.
加法平行四边形法则:共起点的两边为邻边作平行四边形,共起点
减法三角形:同起点,连终点,方向
(9)共线向量基本定理:空间两个向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4220bc106912baca47334a7b767cb851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(10)数乘运算律:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294c0f85a47e8f5e004611af0bdd75a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a4ee3c424455ab04b1cf0acfb87d62.png)
您最近一年使用:0次
7 . 如图,在长方体
中,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984b059c26969266523eaa870b147b8a.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984b059c26969266523eaa870b147b8a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/56813708-a032-4783-b1de-2862e0f499d0.png?resizew=159)
您最近一年使用:0次
2023-11-19更新
|
133次组卷
|
2卷引用:河南省南阳市唐河县鸿唐高级中学2023-2024学年高二上学期10月月考数学试题
解题方法
8 . 如图,三棱柱
的所有棱长均相等,
,
分别为
的中点,则异面直线
与
所成角的余弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808d8f02b3ac00d2bad831834dcb5fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac132dccb095f424e33e803e891681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/6f2a2001-59f2-47d9-adca-785882ab0a65.png?resizew=182)
您最近一年使用:0次
9 . 已知四面体ABCD,G是CD的中点,连接AG,则
您最近一年使用:0次
10 . 如图,在四面体OABC中,M是棱OA上靠近点A的三等分点,N,P分别是BC,MN的中点.设
,
,
,用
,
,
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420ad6159fc091d6a5ffddf0676d2662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c2e7e9fd8519fd1c293cc577408263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40f8ef7e3af00c41f85a20578afdb57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/bde83123-41ec-42fe-bb5e-708c025f0f79.jpg?resizew=125)
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