f(x)=2(cosx)^2-2√3sinxcosx-1=(cos2x+1)－√3sin2x-1=cos2x－√3sin2x=2cos（2x+π/6）周期T=2π/│ω│=2π/2=π因为y=cosx的对称轴方程为:x=kπ令2x+π/6=kπ则x=Kπ/2-π/12f(x)对称轴方程为:x=Kπ/2-π/12(K∈...