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A wave is represented by the equation y ...

A wave is represented by the equation `y = a sin (kx - omega t)` is superposed with another wave to form a stationary wave such that the point x= 0 is a node. Then the equation of the other wave is

A

`y = -a sin (kx + omega t)`

B

`y = a sin (kx + omega t)`

C

`y = a cos (kx - omega t)`

D

`y = a cos (kx + omega t)`

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The correct Answer is:
D
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