3) Explain whether the functions below are waves or not using the wave equation. а. и(х, у, t) %3D sin(x — 2t) cos(3y — t) b. u(х, у) — sin(3t) + sin(x/3) cos(3t)
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Explain whether the functions below are waves or not using the wave equation.
a. ?(?,?,?)=sin(?−2?)cos(3?−?)
b. ?(?,?)=sin(3?)+sin(?/3)cos (3?)
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