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Statement of a problem № 3458

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Show that the equation y = 2 A sin(npix /L ) cos 2pi ft for a standing wave is a solution of the wave equation d^2y/dx^2=n/F d^2y/dt^2 where F is the tension and n the mass/unit length.

Solution:
Show that the equation y = 2 A sin(npix /L ) cos 2pi ft for a standing wave is a

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