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picture each vector as the hypotenuse of a right triangle made up of north-south and east-west components
using the unit circle and trigonometry , calculate the value of the components and add them
___ n-s plus n-s and e-w plus e-w
the summed values are the components of the resultant vector of the answer
use Pythagoras on the components to find the magnitude of the resultant , and use trigonometry to find the direction angle