how to calculate hyperbolic cosine

Hi everyone, I have an equation -> y=[cosh(ak)/cos(bk)]^2

I know y, a and b. then, How can I calculate 'k' in the matlab?

I have so many data so that I have to calculate in matlab Please help.

thank you

Answer 1

[KSSV]

syms  k

a = rand ;
b = rand ;
y = rand ;
eqn = y^2==(cosh(a*k)/cosh(b*k))

[jiyun shin]

thank you!