## Trigonometry 7th Edition

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 $\,(30\sqrt{2},30\sqrt{2})$