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A wave represented by the equation y=aco...

A wave represented by the equation `y=acos(kx-omegat)` is superposed with another wave to form stationary wave such that the point x=0 is a node. The equation for the other wave is:

A

`a sin (kx+omegat)`

B

`-a cos (kx+omegat)`

C

`-a cos (kx-omegat)`

D

`-a sin (kx-omegat)`

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The correct Answer is:
B
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