@Axel Vogt 

I tried putting omega=115 to  check if my matrix in correctely written. While ploting by putting #omega=115, it is taking time and i couldn't get the solution

@acer

I did similar to your solution, but agai, it is not working.

Please check my sheet.

Shear_coefficient_-_Papers_ac_-_transfer_matrix.mwwh

I made a new matrix H and want to find the value of real value of omega from the determinant of H and want to get a plot H vs omega. But error is occuring.

A checked the matrix py putting arbitay value of omega and it is showing numerical value. But if want to plot omega vs H, error is occuring. Help Me

The file is attached.

Shear_coefficient_-_Papers.mw

@Carl Love 

Can you send me the worksheet because, in my plot, it is not going beyond 100.

@Carl Love 

I have one solution to abobe problem where P=2030000, alpha=53.9 degree and beta=53.4 degree, not a complex answer.