246−2−4−6123−1−2−3−4
a = 4.0
b = 3.0
x2a2+y2b2=x216.00+y29.00=1
(2.9923, 1.9909) (drag me)
tangent
246−2−4−624−2−4−6
2xa2+2yb2dydx=0
dydx=xa2b2y=9x16y
(2.9923, -0.8454)