直三棱柱
中,
,
分别是
的中点,
,则
所成角的余弦值为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e89a358226b4be8786077a60555c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802c4767d2083845cd882681509c3c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b6ba3fda80684817e162de9c26ec01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e6d7d1f211b8a7b6e0223641430a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77114108d8ffa89b84b1c55c063926b0.png)
更新时间:2023-09-29 17:03:01
|
【知识点】 异面直线夹角的向量求法
相似题推荐
填空题-单空题
|
容易
(0.94)
名校
解题方法
【推荐1】设
分别是空间两直线
的方向向量,则直线
,
所成角的大小为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d9c9ba19d6018ea03429653c59a485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
您最近一年使用:0次
填空题-单空题
|
容易
(0.94)
名校
解题方法
【推荐2】在直三棱柱
中,若
,则异面直线
与
所成的角等于_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f6419d294e42cf08dfa68aa758a10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
您最近一年使用:0次