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0btuse
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Homework Statement
Three vectors A, B, C, each have a magnitude of 46 m and lie in an xy plane. Their directions relative to the positive direction of the x-axis are 28 ˚, 191 ˚, and 313 ˚.
What are the magnitude and the angle of A-B+C with right-arrow in the range of (-180°, 180°)?
Homework Equations
The Attempt at a Solution
Nx = 46cos(28)-46cos(191)+46cos(313)= 117.15
Ny = 46sin(28)-46sin(191)+46sin(313) = -3.26
N= sqrt((117.15^2)+(-3.26)^2)
N = 117.11
For the angle i have tan^-1 (-3.26/117.15) = -1.60°
the online homework is accepting my answer for the angle as being correct, however I'm not as fortunate with the magnitude.