ABSTRACT
Hence, θ = or θ = π + Thus, (−5, −12) in Cartesian co-ordinates corresponds to (13, 247.38◦) or (13, 4.318 rad) in polar co-ordinates.
Problem 4. Express (2, −5) in polar co-ordinates
A sketch showing the position (2, −5) is shown in Figure 24.5.
