1. The problem statement, all variables and given/known data Limx-->positive infty arctan(1+x)/(1-x) 2. Relevant equations 3. The attempt at a solution I just need to know if my answer is right. Knowing that when the leading coefficients of the x when its the same, then the answer is just the ratio. So it would be -1. Then in my calculator I put arctan -1 and it gave -45. Is this right?