Question

How do you convert the polar equation `r=3` into rectangular form?

Answer 1

`x^2+y^2=9`

Explanation:

`color(orange)"Reminder"`

`• r=sqrt(x^2+y^2)`

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

`"squaring both sides"`

`rArrx^2+y^2=9larr" in rectangular form"`

`"this is the equation of a circle, centred at O, with radius 3"`