已知正四面体
,
为
中点,
为
中点,
在线段
上一个动点(包含端点),则直线
与直线
所成角余弦值的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-07-19 16:14:58
|
【知识点】 异面直线夹角的向量求法
相似题推荐
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,正方体ABCD﹣A1B1C1D1的棱长为a,以下结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/ba2294ba-ae9b-42a2-986b-052959713a30.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/ba2294ba-ae9b-42a2-986b-052959713a30.png?resizew=176)
A.面对角线中与直线A1D所成的角为60°的有8条 |
B.直线A1D与BC1垂直 |
C.直线A1D与BD1平行 |
D.三棱锥A﹣A1CD的体积为![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】手工课可以提高学生的动手能力、反应能力、创造力.某小学生在一次手工课上制作了一座漂亮的房子模型,它可近似地看成是一个直三棱柱和一个正方体的组合体.其直观图如图所示,
,
,
、
、
、
分别是棱
、
、
、
的中点,则异面直线
与
所成角的余弦值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1ea8de33f0b596d6cf06138766acb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433163f25ef7c4c8237eaf6c7e44c614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/9119482b-b992-4b51-bc43-b7c73535244a.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次