If f(x)=sin2(x)f(x) = \sin^2(x)f(x)=sin2(x), what is the third derivative f′′′(x)f'''(x)f′′′(x)?
−4cos(2x)-4 \cos(2x)−4cos(2x)
4sin(2x)4 \sin(2x)4sin(2x)
−4sin(2x)-4 \sin(2x)−4sin(2x)
2cos(2x)2 \cos(2x)2cos(2x)