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In a stationary wave respresented by y=...

In a stationary wave respresented by `y=2acos(kx)sin(omegat)` the intensity at a certain point is maximum when

A

`cos(kx)` is maximum

B

`cos(kx)` is minimum

C

`sin(omega t)` is maximum

D

`sin (omega t)` is minimum

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The correct Answer is:
A
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