LIM (x tends to positive infinity) cosx / [e ^ x + e ^ (- x)] =?

LIM (x tends to positive infinity) cosx / [e ^ x + e ^ (- x)] =?

When x tends to infinity, e ^ (- x) = 0
E ^ x Infinity
So 1 / [e ^ x + e ^ (- x)] is infinitesimal
Cosx is a bounded variable
So the limit is a bounded variable multiplied by an infinitesimal, and the result is 0