1. The problem statement, all variables and given/known data I have a problem, I don't know how to find the limit (cos(Pi/2x))^2x when x is ∞ 2. Relevant equations (1+(1/x))^(1/x)=e 3. The attempt at a solution I have been looking for solutions on the internet, but most of these just tend to be for fractions, I don't know how to operate with a cosine. Any help?