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1 . 若空间两个单位向量
、
与
的夹角都等于θ,则当θ取最小值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bead945284ae967c8c526c9a73a26e6.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aad7b6bdcc4c62fd75105d55443bd77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6fc1576637ac1b0d888f874cbaf00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed99b6fe2fa6512d1f293257629c6e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bead945284ae967c8c526c9a73a26e6.png)
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2 . 如图,在平行六面体.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b125fafb16819e103d49b1374932abe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8689281b26bb0323c4f8055cd672d38.png)
,设向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4558eb885fab4c2047ac078135fae315.png)
(1)用
表示向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd7bd26cc18343c5c3fdf84333c480e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b125fafb16819e103d49b1374932abe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8689281b26bb0323c4f8055cd672d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4558eb885fab4c2047ac078135fae315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/96cc5637-7f35-4cd2-8f9c-c528b9471819.png?resizew=169)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3352ef5f607b600467e786b4e0654e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd7bd26cc18343c5c3fdf84333c480e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6442fa9c249ccfdc412347a6b772b218.png)
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3 . 已知平行六面体
的所有棱长均为
,
,
,
分别为
,
的中点,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29325f51647dde45ffa565600d353d11.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
A.2 | B.3 | C.![]() | D.![]() |
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5卷引用:四川省成都市新都区新都香城中学2023-2024学年高二上学期10月月考数学试题
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解题方法
4 . 在正四面体
中,
分别是
的中点,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be58ea6ca37a850422631eb3e994d9.png)
A.![]() | B.![]() |
C.![]() | D.异面直线![]() ![]() ![]() |
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5卷引用:四川省成都市龙泉驿区东上高级中学2023-2024学年高二上学期期中数学试题
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解题方法
5 . 在空间直角坐标系中,已知向量
(
),点
,点
.
(1)若直线
经过点
,且以
为方向向量,
是直线
上的任意一点且其坐标满足
,称为直线
的方程;
(2)若平面
经过点
,且以
为法向量,
是平面
内的任意一点且其坐标满足
,称为平面
的方程.
设直线
的方程为
,平面
的方程为
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034251ca215dfa66611dc64891c8ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5512a225837088e0689c3c38137a8f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4970e0d8b1391fd31aa9fc799aa201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bfcaf2a345411411cf94422703e9269.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a01ec1c61f3a65e83785ffa01bf46f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若平面
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8531f3ac2dc86c07956038798396b124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154fa4de882af2a2d436097c50ed1442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d6a64281af0c28997c9b6f729c83a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fab389b077f28d5e2f5ab1e5fffa1b.png)
A.![]() |
B.直线![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.向量![]() ![]() ![]() ![]() ![]() |
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6 . 下列关于空间向量的命题中,正确的是( )
A.向量![]() ![]() ![]() ![]() |
B.任意向量![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.已知向量![]() ![]() ![]() ![]() |
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7 . 在平行六面体
中,
的重心为点
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c967c9b3f669ea78edd838e1d8b59e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
A.![]() |
B.若![]() ![]() ![]() |
C.![]() |
D.![]() |
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8 . 在三棱柱
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b27b5fb68fbe2f6380c16cc48f9987.png)
,
为
上一点,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b27b5fb68fbe2f6380c16cc48f9987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e17995e2f71e297d94ae51c7e5b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6672ddb82d7da014b60da1738ae61b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/26/6bb7412f-4096-4fba-91b1-07d79e73b7d6.png?resizew=150)
A.2 | B.3 | C.![]() | D.![]() |
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3卷引用:四川省绵阳市三台中学2023-2024学年高二上学期期中考试数学模拟试题(一)
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9 . 如图,两个正方形ABCD,CDEF的边长都是6,且二面角
为
,M为对角线AC靠近点A的三等分点,N为对角线DF的中点,则线段MN=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d76403bac26df50d934d93586f8a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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四川省绵阳南山中学2023-2024学年高二上学期期中考试数试题江苏省郑梁梅高级中学2022-2023学年高二下学期期中数学试题湖南省永州市宁远县第二中学2023-2024学年高二上学期9月联考数学试题河北省衡水市第十四中学2023-2024学年高二上学期一调数学试题山东省临沂市平邑县平邑县第一中学2022-2023学年高二上学期10月月考数学试题内蒙古乌兰察布市四子王旗宽高实验学校2023-2024学年高二上学期期中数学试题(已下线)专题 01 空间基底及综合应用(3)(已下线)专题 01 空间基底及综合应用(4)安徽省合肥市第一中学2023-2024学年高二上学期素质拓展训练(10)数学试题
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10 . 如图,在四棱锥
中,底面
是边长为
的正方形,侧棱
的长为
,且
与
、
的夹角都等于
,
在棱
上,
,设
,
,
.
(1)试用
,
,
表示出向量
;
(2)求
与
所成的角的余弦值.
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b88b8eab0ebbf900f3c6262eb05478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b9d8a08fc52c31cc1a7f527d18b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2216c8d5369dc1e1d8135a2aedc63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff88b56d9d8e6df3cba984c57dee259.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/c334a62e-d86c-4d27-b669-7d192e6445eb.png?resizew=152)
(1)试用
![](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/d7a046d7060dc843c78af806ee24f556.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7a046d7060dc843c78af806ee24f556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7239b3f2d88c2e45e17e5de9ae1a332.png)
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