Hey I am not sure how to find the second coordinate of these polar coordinates.
a) Find polar coordinates (r, θ) of the point (4, -4), where r > 0 and 0 ≤ θ ≤ 2π.
I tried doing
But this is incorrect?
For r < 0 and 0 ≤ θ ≤ 2π.
How do I find theta?