- #1

- 343

- 1

## Homework Statement

the sequence is a

_{n}= (cos(n))^2 / 2^n

## Homework Equations

none really

## The Attempt at a Solution

like i mentioned in my last post, i usually use l'hopitals or dividing by the largest exponent from the denominator. here, i dont see why i would want to use l'hopitals, so thats out of the question. i cant really divide by the largest exponent. is there a way i could break this down or something?