1. The problem statement, all variables and given/known data a.\lim_x -->infty arctan(x^2-x^4) = b.\lim _x --->pi/2 e^tan (x) = 2. Relevant equations Limit laws 3. The attempt at a solution a. I know I can use the limit laws to take the limit of Arctan@infinity=1/2, but then, I don't know if I should factor out the (x^2-x^4) b. Don't even know.