Question

Rewrite in polar form:x^2 + y^2 - 2y = 7

Answer 1

`r^2=2r\sin\theta+7`

Explanation:

Recall that
`r^2=x^2+y^2` and
`y=r\sin\theta`:

`x^2+y^2-2y=7\\r^2-2r\sin\theta=7\\r^2=7+2r\sin\theta`