The function F(x)=∫0x(1+cos(t)),dtF(x) = \int_{0}^{x} (1 + \cos(t)) , dtF(x)=∫0x(1+cos(t)),dt represents the accumulation of the function (1+cos(t))(1 + \cos(t))(1+cos(t)) over the interval [0,x][0, x][0,x]. What is F′(x)F'(x)F′(x)?
