Vastaus: Nopeus on # = 0.97ms ^ -1 # Selitys: Nopeus on aseman johdannainen. #p (t) = sin (t-pi / 4) + 1 # #v (t) = p (t) = cos (t-pi / 4) # Siksi, kun # T = pi / 3 # #v (pi / 3) = cos (pi / 3-pi / 4) # # = Cos (pi / 12) # # = 0.97ms ^ -1 #