Problem 3-9 - Vector sum - (b)

Find the magnitude and direction of the sum of the vectors \(A + B + C\) using the component technique. Assume two significant digits.
\(A = 20\; km\) north, \(B = 30\; km\) east, \(C = 50\; km\; 55 ^\circ\) west of north.


This is the simplest and intuitive choice for those living in the northern hemisphere. \(\text{E} \rightarrow x\) (to the right looking north) and \(\text{N} \rightarrow y\).