Find the angle θ between u = 〈6, –5〉 and v = 〈11, 8〉.

Use cos θ = (u · v) / (|u||v|). The dot product is 6(11) + (−5)(8) = 26, and the vector lengths are √61 and √185. Thus θ = cos⁻¹(26 / (√61√185)) ≈ 75.83°, so the angle is choice B.

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