1. The problem statement, all variables and given/known data This series is what dictates the graph above. 3. The attempt at a solution I don't understand what's going on. If they're using the series that i pasted below then why aren't they multiply each value in the brackets by -2/pi? I also don't get why terms in the brackets are [(-2pi + 0) + f(-2pi - 0)] Where did they come from? Where does 1/2 come from that multiplies the brackets. very confused.