Question

How do I find the polar equation for `y = 5`?

Answer 1

We can easily convert equations from cartesian coordinates to polar coordinates by making the substitutions `x = r*cos(theta)` and `y = r*sin(theta)`. Therefore, the equation `y = 5` will be rewritten as `r*sin(theta) = 5 -> r = 5/sin(theta)`//

Never forget the most important:
`x = r*cos(theta)`
`y = r*sin(theta)`

Hope it helps.