Vector A has a magnitude of 3.0 units and makes an angle of -90.0
with the positive x-axis. Vector B has a magnitude of 4.0 units and makes an angle of -120
with the positive x-axis. What is the direction of the vector sum of A + B referenced to the positive x-axis?
A. -107
B. 55
C. -55
D. -145
A. -107
Physics & Space Science
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