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Vectors A and B lie in an xy plane. Vector A has a magnitude of 8.1...

Vectors A and B lie in an xy plane. Vector A has a magnitude of 8.1 and angle 144 degrees relative to +x direction; Vector B has components Bx= -4.31 and By= -8.51. What are the angles between the negative direction of the y axis and a) the direction of Vector A, b) direction of the product of Vector AxB, and c) the direction of Vector Ax(Vector B + 3.00k)?

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