Simple Integration question Hey: I am doing a practice exam question and it gives me two families of integrals, the first one being: Cn= int(pi,0) xn cos(x) dx int n>= 0 It has asked for me to do integrate this as C0 I have assumed this means n = 0. Do I change the n to a zero before or after integrating? I can't find anywhere in my learning centre that tells me this. No urgency, this is just extra study for the exam in a few weeks. I may have additional questions that follow on this, but the integration itself seems straight forward, so do most of the future questions. Thanks in advance.