在斜三棱柱
中,
为
中点,
,
,
,用
,
,
表示
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da5f9be01066599267291ac0789ed388.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a954804ae722fb7949c283170115a1ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6260bc71ab21c80626e4628d81360df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac53b436ff53770bba94478a39997a.png)
![](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/3781501d462c73d9927b8dfa8d980b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da5f9be01066599267291ac0789ed388.png)
更新时间:2020-06-26 15:16:42
|
【知识点】 空间向量加减运算的几何表示
相似题推荐
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】已知
是异面直线,
,
,且
,则
与
所成的角为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3044c3309f4e5f814508da88714afde1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77a31df1fe08f18dc27a886eb252aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9c8118da6497773855883f36bcbe4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐2】在长方体ABCD-A1B1C1D1中,BC=CC1=1,∠AD1B=
,则直线AB1与BC1所成角的余弦值为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65af1d6b6b831ebbdc36dda5f304a3a1.png)
您最近一年使用:0次