get several answers with solve

hi i want to have several answers for this eq: cos(x)*cosh(x)+1=0

but when i use this code :

solve('cos(x)*cosh(x)+1=0')

i just get one answers

Answer 1

[John D'Errico]

There is no analytical solution.

syms x
solve(cos(x)*cosh(x)+1==0)
Warning: Unable to solve symbolically. Returning a numeric solution using vpasolve. 
> In sym/solve (line 304) 
ans =
-212.05750411731104359622842837137

So solve tells you that it used a numerical solver. That you want it to find all solutions is not that mathematically relavant, unless you are good with a magic wand.

You can use a numerical solver, starting from different start points, then collect all solutions found. But wanting the impossible only makes you a dreamer.