1. The problem statement, all variables and given/known data Lim (cosθ-√3/2)/(θ-[itex]pi[/itex]/6) θ→[itex]pi[/itex]/6 2. Relevant equations 3. The attempt at a solution My attempt at this has been to try to multiply both the numerator and denominator by either the numerator's or denominator's conjugate. both result in 0 at the denominator. I also factored out θ from the numerator and denominator but that still results in a 0 for the denominator. Am I supposed to be able to differentiate this? It doesn't seem possible. How am I supposed to solve this? Thanks in advance guys. Sorry if this is in the wrong format.