已知函数f(x)=Asin(ωx+ϕ)(A>0,ω>0,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237021_ST/0.png)
)在一个周期内,当
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237021_ST/1.png)
时,y有最大值为2,当
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237021_ST/2.png)
时,y有最小值为-2.
(1)求函数f(x)表达式;
(2)若g(x)=f(-x),求g(x)的单调递减区间.
考点分析:
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