A particle executes S.H.M. with an amplitude of 10 cm and frequency 2Hz. At t=0, the particle is at a point where potential energy and kinetic energy are same. The equation of displacement of particle is:
A. 0.1 sin 4πt
B. 0.1 cos (4πt + π/4)
C. 0.1 sin (4πt + π/4)
D. None of these