A.) Assume a rectangular coord system has its origin at the center of an elliptical planetary orbit and that the coord system x axis lies along the major axis of the ellipse. Show that the equation for the ellipse is given by x^2/a^2 + y^2/b^2 =1. where a and b are the lengths if the semi-major axis and the semi-minor axis, respectively. b.) using the results from a, prove the area of an ellipse is given by A=(pi)ab. Im am completely lost right now. Any ideas?