Question

i have no idea how she got these steps and the graph

Answer 1

@Zepdrix

Answer 2

yay team, we got it

Answer 3

yayy ;p

Answer 4

how did she get 0 to pi for the bounds?
@Zepdrix

Answer 5

You have to understand the graph that the equation draws out.
It's a circle that's been shifted up 1 unit.

See the green arrow she drew?
We only need to rotate half way around our coordinate plane to cover the entire circle.

Answer 6

I can't think of the numerical way of coming up with those boundaries, sorry :\

Answer 7

oh wait i see how she got it ;p

Answer 8

is there an easier way to do this one

Answer 9

i dont get it at all @Zepdrix

Answer 10

its the answer doe