1. The problem statement, all variables and given/known data Find the absolute max and min of f(t)=t + cot(t/2) on [pi/4, 7pi/4] 2. Relevant equations 3. The attempt at a solution I have attempted to find the derivative which I believe is 1 - csc^2 (t/2) * (t/2) which I can simplify down to cot^2 (t/2) * (t/2) Even if that is correct, which I am doubtful of, where do I go from here? Thank You!