已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183252755597744/SYS201310241832527555977015_ST/0.png)
(1)求函数f(x)的对称轴方程;
(2)当
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183252755597744/SYS201310241832527555977015_ST/1.png)
时,若函数g(x)=f(x)+m有零点,求m的范围;
(3)若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183252755597744/SYS201310241832527555977015_ST/2.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183252755597744/SYS201310241832527555977015_ST/3.png)
,求sin(2x
)的值.
考点分析:
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