Question

How do you convert `r = - 5 Cos theta` to rectangular form?

Answer 1

`x^2+y^2=-5x`

Explanation:

`x^2+y^2=r^2`

`r^2=-5rcostheta->`multiply both sides by r

So `x^2+y^2=-5rcostheta`

Recall that `x=rcostheta`

So `x^2+y^2=-5x`