函数f(x)=2sinx(1+sinx)+2cos^2x-1
=2sinx+2sin^2x+2cos^2x-1
=2sinx+2-1=2sinx+1.
w>0, x∈[-π/2,2π/3]
∴wx∈[-wπ/2,2wπ/3],
区间[-wπ/2,2wπ/3]包含原点,而原点附近的增函数区间是[-π/2,π/2],
所以区间[-wπ/2,2wπ/3]应包含于区间[-π/2,π/2].
所以-wπ/2≥-π/2,2wπ/3≤π/2.
∴0