f（x）=ab=√3coswx*sinwx-sinwx*sinwx=√3/2sin2wx-(1-cos2wx)/2=√3/2sin2wx+1/2cos2wx-1/2=sin(2wx+π/6)-1/2最小正周期T=2π/2w=π w=1f(x)=sin(2x+π/6)-1/2余弦定理cosx=(b^2+c^2-a^2)/2bc=(b^2+c^2-bc)/2bc b...