1 . 已知四面体
中,
,且
与平面
所成的角为
,则当
时,
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8c3e673f6942831b8431e44409689f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ab4b75fa22deba7fcbcdcb31dd45b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f31592afa0f6735b29d6c616ff567c.png)
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2 . 已知
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbe3484f0b04cca9df39186c31bec8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2545207cfc3fcef81037b24c71a0b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b958a367fa2f08b6202a5a6ebf5e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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3 . 已知向量
,
,
,若
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249a3b88b4ef6ad322ac02e4ff9908f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5560936ed91ac9b6c0084ef0958ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43ceb3fb77c525a74ec9cf5af85d0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78026507d272b66ba3862dd401ad098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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名校
4 . 已知
是空间的一个单位正交基底,且
,则
与
夹角的余弦值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808173f5aafa97a38056d68247d68314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21f6d3f0953eb14dc0b7343b41416aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1070a28cb9cb8553c29747d1993b16.png)
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解题方法
5 . 在空间直角坐标系
中,向量
分别为异面直线
的方向向量,若
所成角的余弦值为
则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4dc435ca66245a962e73c5e7043a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e4afd09a92328e04ab6eb85d4156f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b270384ef6e4041b44aa962a788657fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45eaef6deb09d7c491288ed30b8f0e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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6 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af17aa5c47364f1f59cd47d35dc2ae1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d2f9a779d800aca6361bd20103d1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af17aa5c47364f1f59cd47d35dc2ae1.png)
您最近一年使用:0次
名校
解题方法
7 . 已知向量
,则点A到直线
的距离为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c9e69b7d07118b514174f391f1a58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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2024-02-23更新
|
209次组卷
|
2卷引用:福建省福州第三中学2023-2024学年高二上学期1月期末数学试题
8 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af17aa5c47364f1f59cd47d35dc2ae1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b16dedb8022cb6cfed66814306b3cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af17aa5c47364f1f59cd47d35dc2ae1.png)
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9 . 已知空间向量
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87aefab2c348022dff54224715ad9d4.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b672fe524f188686f89448cbb5f275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87aefab2c348022dff54224715ad9d4.png)
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解题方法
10 . 如图①是直角梯形
,
,
,
是边长为2的菱形,且
,以
为折痕将
折起,当点
到达
的位置时,四棱锥
的体积最大,
是线段
上的动点,则
面积的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e557ac8c744f9961a6d544a75321e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1e038b4e76b3a368731d3331522b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2eb89294b31ffdd2680b4361e8994d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/b449f0e3-442c-4cc4-b75b-d909f81ba02c.png?resizew=281)
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