sin(x-π/3)+√3cos(x-π/3)
=2{sin(x-π/3)cosπ/3+sinπ/3cos(x-π/3)}
=2sin(x-π/3+π/3)
=2sinx
f(x)=4sin^(2)x=2(1-2cos2x)
T=2π/2=π