evaluate cos^2 (ej)
If I recall correctly:
cosh(x) = cos(ix) or in your case cos(je)
so cos^2 (ej) = (cosh(e))^2
(Haven't done this in over 60 years)
cosh(x) = cos(ix) or in your case cos(je)
so cos^2 (ej) = (cosh(e))^2
(Haven't done this in over 60 years)