Obtain the solution in the form of the Fourier sine series and use Parseval's equality for...

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Obtain the solution in the form of the Fourier sine series and use Parseval's equality for the Fourier sine series to show that E (t2) E (t1) for every , 0 t1 t where \[E(t)=\int _{0}^{\pi}|u(x, t)|^{2} dx \] Obtain the solution in the form of the Fourier sine series and use Parseval's equality for the Fourier sine series to show that E (t2) E (t1) for every , 0 t1 t where \[E(t)=\int _{0}^{\pi}|u(x, t)|^{2} dx \]