解(1)由f（x）=sin（π/3-2x）=-sin(2x-π/3)当2kπ-π/2≤2x-π/3≤2kπ+π/2,k属于Z时，y是减函数，即kπ-π/12≤x≤kπ+5π/12,k属于Z时，y是减函数，知函数的减区间为[kπ-π/12，kπ+5π/12],k属于Z.
