Chapter 1 - Section 1.2 - The Rectangular Coordinate System - 1.2 Problem Set - Page 25: 44

First Base $\,(30\sqrt{2},-30\sqrt{2})$ Third Base $\,(30\sqrt{2},30\sqrt{2})$

We need to calculate $a$ in the figure $$a = 60\times\cos{(45^\circ)}= 30\sqrt{2}$$ $\therefore$ First Base $\,(30\sqrt{2},-30\sqrt{2})\,\,\,\,\,\&$ Third Base $\,(30\sqrt{2},30\sqrt{2})$