Express the given parametric curve by an equation in x and y, then sketch the curve.
(a) x = 2 tan t, y = 3 sec2 t − 4, for −
�
2
< t <
�
2
.
(b) x = 2et + 1, y = 3et + 2.
(a) x = 2 tan t, y = 3 sec2 t − 4, for −
�
2
< t <
�
2
.
(b) x = 2et + 1, y = 3et + 2.