∵π/3-2x∈[2kπ+π/2,2kπ+3π/2]
-2x∈[2kπ+π/6,2kπ+7π/6]
∴x∈[kπ-7π/12,kπ-π/12](k∈Z)
∴y=2sin(π/3-2x)单调增区间为
[kπ-7π/12,kπ-π/12](k∈Z)