如图,在直三棱柱
中,
,
是
的中点,以
为坐标原点,建立如图所示的空间直角坐标系. 若
,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/5368f41f50808fbf73362fa788304a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed7988dc0ec37adbc0162ac19933ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23高二上·江苏苏州·期末 查看更多[6]
江苏省苏州市2022-2023学年高二上学期2月期末学业质量阳光指标调研数学试题(已下线)高二数学下学期第一次月考模拟试卷(空间向量与立体几何+计数原理)-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)(已下线)模块三 专题2 小题进阶提升练( 2)(苏教版高二)陕西省安康市高新中学2023-2024学年高二上学期12月月考数学试题(已下线)模块四 专题6 重组综合练(江苏)期末终极研习室(高二人教A版)(已下线)模块一 专题6《 空间向量应用》 B提升卷 (苏教版)
更新时间:2023-02-10 23:21:00
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【推荐2】以下命题正确的是( )
A.直线l的方向向量为![]() ![]() |
B.直线l的方向向量![]() ![]() ![]() ![]() |
C.两个不同平面![]() ![]() ![]() ![]() |
D.平面![]() ![]() ![]() ![]() ![]() |
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解题方法
【推荐1】如图,圆锥的高
,底面直径
是圆
上一点,且
,若
与
所成角为
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/7082b9a4-b79e-4215-9cfe-c15d28c9ff3d.png?resizew=122)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在棱长均相等的正三棱柱
中,
为
的中点,
在
上,且
,则下述结论:①
;②
;③平面
平面
:④异面直线
与
所成角为
其中正确命题的个数为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
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A.1 | B.2 | C.3 | D.4 |
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