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enter image description here

This is the expression to be derived but I am not getting the exact expression as given in the image. Is the given expression given for the implicit Euler method?

Here $N_c = c (\delta t)/h$ and $\tan(\beta_2) = N_c \sin (kh)$.

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  • $\begingroup$ Can you explain what the problem is? $\endgroup$
    – nicoguaro
    May 30 at 15:44
  • $\begingroup$ @nicoguaro I have to derive the above equation, but I cannot understand how we are getting e^(-i beta 2) in the expression. $\endgroup$
    – Avii
    Jun 3 at 7:54
  • $\begingroup$ We could guess that much. But, what is the starting point? What is your differential equation, what is your discretization scheme? $\endgroup$
    – nicoguaro
    Jun 3 at 13:47

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