f(x)=cosx/2(sinx/2+√3cosx/2)-√3/2=sinx/2cosx/2+√3cos²x/2-√3/2 =1/2sinx+√3/2(1+cosx)-√3/2=sinxcosπ/3+cosxsinπ/3=sin(x+π/3)由x+π/3=kπ+π/2,k∈Z得x=kπ+π/6,k∈Z即y=f(x)的对称轴...