Let and . The angle between and is closest…

MATHEMATICS · Single correct · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

Let u⃗=2i−j+2k\vec{u}=2\mathbf{i}-\mathbf{j}+2\mathbf{k} and v⃗=i+2j+2k\vec{v}=\mathbf{i}+2\mathbf{j}+2\mathbf{k}. The angle between u⃗\vec{u} and v⃗\vec{v} is closest to (a) 60∘60^\circ (b) 63∘63^\circ (c) 45∘45^\circ (d) 53∘53^\circ

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