A wave motion has the function y=a0sin(o...

A wave motion has the function `y=a_0sin(omegat-kx)`. The graph in 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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A wave motion has the function `y=a_0sin(omegat-kx)`. The graph in 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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