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The wave motion has the function y=a(0)s...

The wave motion has the function `y=a_(0)sin(omegat-kx)`. The graph in the figure shows how the displacement y at a fixed point varies with time t. which one of the labelled points shows a displacement equal to that at the position `x=pi//2k` at time t=0?`

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The correct Answer is:
b
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