in 2001 Q4 they say,
a particle, who displacement is x, moves in simple harmonic motion.
find x as a function of t, if a=-4x and if x=3 v=6root3 when t=o
i assumed x=acos (nt+@) since it was S.H.M and when on from there 2 find that
x=6cos(2t + 60*) which was the right answer, althou my...