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A wave yi =0.3 cos (0.2x-40t) is travell...

A wave `y_i =0.3 cos (0.2x-40t)` is travelling along a string toward a boundary at x = 0. Write expressions for the reflected waves if
The string has a fixed end at x = 0.

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`y (x,t) = 0.3 cos (2.0 x + 40 t +pi)`
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