A standing wave pattern is formed on a string. One of the waves is given by equation `y_1=a cos (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 cos (omegat+kx +pi/3)` |
| C. |
`y_2=a cos (omegat+kx +(2pi)/3)` |
| D. |
`y_2=a cos (omegat+kx +(4pi)/3)` |
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