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.

Correct!

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

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