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college physics

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Consider two vectors A = 4i - 4j and B = -i - 8j .
(a) Calculate A + B.
(b) Calculate A - B.
(c) Calculate absolute value(A + B).
(d) Calculate absolute value(A - B).

(e) What is the direction of A + B? (from the +x axis)
(f) What is the direction of A - B? (from the +x axis)

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