1、T=6π A=2
ω=1/3 φ=π/6
f (x)=2sin(x/3+π/6)
2、y=g(x)=2sin((x-π/3)*3/3+π/6)=2sin(x-π/6)
3、单调递增区间[-π/3,2π/3]
对称轴方程 x=kπ-π/3
对称中心坐标 x=kπ+π/3