f(x)=sin(2x+π/3 )+√3cos(2x+π/3),f(x)的周期,单调减区间为什么

f(x)=sin(2x+π/3 )+√3cos(2x+π/3),f(x)的周期,单调减区间
为什么

f(x)=2sin(2x+π/3+π/3)
T=2π/2=π
单减（kπ-1/12π,kπ+5/12π)