What is the derivative of f(t)=sin(t)cos(t)f(t) = \sin(t) \cos(t)f(t)=sin(t)cos(t)?
cos2(t)−sin2(t)\cos^2(t) - \sin^2(t)cos2(t)−sin2(t)
sin2(t)+cos2(t)\sin^2(t) + \cos^2(t)sin2(t)+cos2(t)
111
−2sin(t)cos(t)-2\sin(t)\cos(t)−2sin(t)cos(t)