Question

How do you write this equation in polar coordinates: `x^2 + y^2 = 2`?

Answer 1

`{(r,theta):r^2=2}`

Explanation:

`x^2+y^2=2` is a circle with radius (`r`) equal to `2`

Note that the angle (`theta`) is not constrained by this equation (similar to the way `y` is not constrained by the linear equation `x=5`)