Posted by Kyra on Monday, April 8, 2013 at 10:49pm.
Find the magnitude of the resultant vector of two 5pound forces that act on an object with an angle of 70° between them.

Math  Steve, Tuesday, April 9, 2013 at 12:11am
let
u = (5,0)
v = (5cos70°,5sin70°)
then
u+v = (5(1+cos70°),5sin70°) = (6.71,4.70)
now just get u+v and its direction
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