Answer
(a) See the graph.
(b) $x^2+y^2=x+y$
Work Step by Step
(b)
$x=r~cos~θ$
$y=r~sin~θ$
$r^2=x^2+y^2$
$r=sin~θ+cos~θ$
$r=\frac{y}{r}+\frac{x}{r}$
$r^2=x+y$
$x^2+y^2=x+y$
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