Question

How do you convert `r=3+3costheta` to rectangular form?

Answer 1

`x^2 +y^2 = 3 sqrt(x^2 +y^2)+ 3x`

Explanation:

Multiply with r, `r^2 =3r +3rcostheta`

`x^2 +y^2 = 3 sqrt(x^2 +y^2)+ 3x`