Trig simplification question

Questions
1

Can Mathematica simplify an expression like Cos[2 Integers [Pi]] ?

2

What is Integers? Do you mean

Simplify[Cos[2 n Ļ€], n āˆˆ Integers]
(* 1 *)
3

Thanks, Rohit Namjoshi. The ā€œIntegersā€ in my post was the result of using ā€œ/. n->Integersā€ after the Simplify. It placed the double Z in the expression but didnā€™t simpify. Iā€™m still trying to learn the Mathematica order of operations.

4

Hi Jay,

You should read this for an overview of evaluation, and this for operator precedence.