y=√3/2sinx-1/2cosx
=sin(x-π/6)
(1)ymax=1,ymin=-1,T=2π
(2)单调递增区间：x-π/6∈[2kπ-π/2,2kπ+π/2],k∈Z
即：x∈[2kπ-π/3,2kπ+2π/3],k∈Z