A standing wave pattern is formed on a string One of the waves if given by equation `y_1=acos(omegat-kx+(pi)/(3))` then the equation of the other wave such that at `x=0` a node is formed.
A. `y_(2) = a sin (omegat + kx +(pi)/(3))`
B. `y_(2) = a sin (omegat + kx +(pi)/(3))`
C. `y_(2) = a cos (omegat + kx +(2pi)/(3))`
D. `y_(2) = a cos (omegat + kx +(4pi)/(3))`
