在锐角三角形ABC中,角A,B,C所对的边分别为a,b,c,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300019_ST/0.png)
(1)求角A;
(2)若
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,求bc的取值范围.
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已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300018_ST/0.png)
,满足
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.
(Ⅰ)将y表示为x的函数f(x),并求f(x)的最小正周期:
(Ⅱ)已知a,b,c分别为△ABC的三个内角A,B,C的对应边长,若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300018_ST/2.png)
,且a=2,求b+c的取值范围.
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300017_ST/0.png)
,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300017_ST/1.png)
.
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(2)求函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300017_ST/2.png)
的最大值和单调递增区间.
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在△ABC中,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300016_ST/0.png)
.
(I)求角A的大小;
(II)若a=3,sinB=2sinC,求S
△ABC.
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在△ABC中,角A,B,C的对边分别为a,b,c,且满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300015_ST/0.png)
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(Ⅰ)求角A的大小;
(Ⅱ)若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300015_ST/1.png)
,求△ABC面积的最大值.
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已知△ABC的周长为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300014_ST/0.png)
+1,且sinA+sinB=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300014_ST/1.png)
sinC
(I)求边AB的长;
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124235343230013/SYS201310251242353432300014_ST/2.png)
sinC,求角C的度数.
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