求函数y=cos(-2x+π/3)的单调增区间

问题描述:

求函数y=cos(-2x+π/3)的单调增区间

2kπ-π≤-2x+π/3≤2kπ
2kπ-4π/3≤-2x≤2kπ-π/3
kπ+π/6≤x≤kπ+2π/3