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Let a(t) = (5, - 4, - 3)t + (8, 6, - 9) and b(u) = ( - 1, 4, - 3)u + ( -1,

Let a(t) = (5, - 4, - 3)t + (8, 6, - 9) and b(u) = ( - 1, 4, - 3)u + ( -1, - 8, 3). Find the acute angle between the lines (in radians) Submit

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