college physics
posted by Jordan .
Vector A points in the negative x direction. Vector B points at an angle of 27.0 degress above the positive x axis. Vector C has a magnitude of 20 m/s and points in a direction 39.0 degress below the positive x axis.
Given that A+B+C=0, find the magnitudes of A and B.

A = a*(1, 0)^T
B = b*(cos(27°), sin(27°))^T
C = 27*(cos(39°), sin(29°))^T
By using the identity imposed on us by the task, we immediately obtain the result by solving the emerging L.E.S..
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