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I need help with this please and fast I'm so confused please help thank you so much!!! 12. A = 15, B = 7, and

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I need help with this please and fast I'm so confused please help thank you so much!!!

image text in transcribed
12. A = 15, B = 7, and the angle between A and B is 60. What is the magnitude of B - A ? 13. A = 2, B =3 and the angle formed by A and B is 120. Determine the unit vector in the opposite direction of A - B

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