设向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/1.png)
满足:|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/2.png)
|=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/3.png)
,|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/4.png)
|=1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/5.png)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/6.png)
,则向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/7.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231824144234811/SYS201311012318241442348002_ST/8.png)
的夹角为
.
考点分析:
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