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已知,是单位向量,,若向量满足,则的取值范围为( ) A. B. C. D.
已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/1.png)
是单位向量,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/2.png)
,若向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/3.png)
满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/4.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/5.png)
的取值范围为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/6.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/7.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/8.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124340997987506/SYS201310251243409979875005_ST/9.png)
考点分析:
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