f(x)=2sinxcosx-2cos^2 (x)+1+根号3=sin2x-cos2x+根号3=根号2*sin(2x- π/4)+根号3（1）f(π/4)=根号2*sin(π/2- π/4)+根号3=根号2*sin(π/4)+根号3=1+根号3（2）函数f(x)的最小正周期T=2π/2=π；当2x-π/4=π/2+2...