What is Lim x → ∞ cos (x) ?

Answer:
non existent
Step-by-step explanation:
Hello, please consider the following.
[tex]\forall \ n \in \mathbb{N}\\\\cos((2n+1)\pi)=0\\\\cos(2n\pi)=1\\\\\text{So, there is no limit possible for } x \rightarrow +\infty[/tex]
Thank you.