Question

How do you write the rectangular equation `x=-7` in polar form?

Answer 1

`r=-7/(costheta)`

Explanation:

To convert from `color(blue)"cartesian to polar form"`

`color(orange)"Reminder "color(red)(bar(ul(|color(white)(2/2)color(black)(x=rcostheta,y=rsintheta)color(white)(2/2)|)))`

`rArrrcostheta=-7rArrr=-7/(costheta)larr" in polar form"`

This is a vertical line.