Question

How do you convert `r = 1/(1-cos(x))` into cartesian form?

Answer 1

`r=1/(1-cosx)`

`=>r^2=1/(1-cosx)^2`

`=>x^2+y^2=1/(1-cosx)^2`

`=>x^2+y^2=1/(2sin^2(x/2))^2`

`=>x^2+y^2=1/4csc^4(x/2)`