Posted by y912f on Friday, February 13, 2009 at 4:22pm.
Add the vectors
Resultant=200E+400 @30 N of W
= 200E+ 400Cos30 W + 400Sin30N
= -200W+ 346W + 200N combine the West units, and that is it. Now if you want to express it as a direction, then
= 146W+ 200N
find the angle N of W (angle=arctan146/200= 36.1 deg N of W)
and the magnitude, use Pyth theorm, or
magnitude = 200/cos36.1=247
check that
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