已知函数f(x)=
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.
(Ⅰ) 求函数f(x)的最小值和最小正周期;
(Ⅱ)已知△ABC内角A,B,C的对边分别为a,b,c,且c=3,f(C)=0,若向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846017_ST/1.png)
与
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共线,求a,b的值.
考点分析:
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已知|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/1.png)
,|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/2.png)
|=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/3.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/4.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/5.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124130699584648/SYS201310251241306995846013_ST/6.png)
的夹角θ=
.
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