1. The problem statement, all variables and given/known data Use the function f(x) = sin x + cos x, where 0<=x<=pi to answer the following. a) Determine all stationary points. Classify the points as minimum or maximum b) locate the points of inflection c) determine the endpoints of the interval 2. Relevant equations 3. The attempt at a solution So I know that the first and second derivative are f1(x) = cos x - sin x f2(x) = -sin x - cos x Im lost at how to use this to determine my values. Thank you for your help!