ok, can anyone please help me with this question? my textbook is pathetic; it gives the easiest examples and the homework questions are hard; on top of that, they only have the answers to the odd numbered questions which are easier than the even numbered questions; if that wasn't bad enough, my professor just copies the examples from the textbook and shows them during the lectures; he's a nice guy but get some other examples! ok, without any further adew, here's the question: sketch the graph of the function f(x, y) = sin(y); i know that i have to use x, y and z cross sections but i dont quite understand how to use them. if you could provide me with the steps to do this question it would be perfect! thanks.