Given vectors u = ⟨–3, 2⟩ and v = ⟨2, 1⟩, what is the measure of the angle between the vectors?

Use cos θ = (u · v) / (|u||v|). The dot product is (−3)(2) + (2)(1) = −4, and the vector lengths are √13 and √5, so cos θ = −4/√65. Taking the inverse cosine gives θ ≈ 119.7°, so the angle is 119.7° (choice C).

AI-written and checked against the verified answer.