分析,f(x)=a*b-√3=2sinx*cosx+2√3sin²x-√3=sin(2x)-√3cos(2x)=2sin(2x-π/3)当,2kπ+π/2≦2x-π/3≦2kπ+3π/2∴kπ+5π/12x≦kπ+11π/12它的单调递减区间为[kπ+5π/12,kπ+11π/12]y=f(x+θ)=2sin(x+2...