If f(x)=∫0xt2cos(t)dtf(x) = \int_0^x t^2 \cos(t) dtf(x)=∫0xt2cos(t)dt, which of the following represents the expression for f′(x)f'(x)f′(x) at x=πx = \pix=π?
−π2-\pi^2−π2
π2\pi^2π2
000
2π2\pi2π