Answer
$16x^2+7y^2+48y-64=0$,
Ellipse.
Work Step by Step
$r=\frac{8}{4+3sin\theta}$,
$4r+3r\ sin\theta=8$,
$4r=8-3r\ sin\theta$,
$16r^2=(8-3r\ sin\theta)^2$,
$16x^2+16y^2=(8-3y)^2$,
$16x^2+7y^2+48y-64=0$,
Ellipse.
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