1. The problem statement, all variables and given/known data Evalutate the limit, as x approaches 0, log(coshx)/x2 2. Relevant equations L'Hopital's rule 3. The attempt at a solution I can get as far as (sinhx.cosh-1x)/2x by differentiating the top and bottom separately. I'm not sure how to do the next differentiation. Thanks for any help.