已知函数f(x)=2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980015_ST/0.png)
sinxcosx+cos
2x-sin
2x.
(1)求f(x)的最小正周期;
(2)在△ABC中,角A,B,C对应的三边为a,b,c,若f(A)=1,a=2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980015_ST/1.png)
,b=4,求c的值及△ABC的面积.
考点分析:
相关试题推荐
(坐标系与参数方程选做题)
已知直线l方程是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980014_ST/0.png)
(t为参数),以坐标原点为极点,x轴的正半轴为极轴建立极坐标系,圆C的极坐标方程为ρ=1,则圆C上的点到直线l的距离最小值是
.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980013_ST/images0.png)
AB为圆O的直径,AC切圆O于点A,且AC=2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980013_ST/0.png)
cm,过C的割线CMN交AB的延长线于D,CM=MN=ND.则AD的长等于
cm.
查看答案
随机抽取某中学10位高三同学,调查他们春节期间购书费用(单位:元),获得数据的茎叶图如右图,这10位同学购书的平均费用是
元.
查看答案
已知向量|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980011_ST/0.png)
|=1,|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980011_ST/1.png)
|=2,|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980011_ST/2.png)
|=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980011_ST/3.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980011_ST/4.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723198060/SYS201311031006587231980011_ST/5.png)
的夹角为
.
查看答案