Question:
The angle between two vectors $\vec{a}$ and $\vec{b}$ with magnitudes $\backslash 3$ and 4 , respectively, and $\vec{a} \cdot \vec{b}=2 \sqrt{3}$ is
(A) $\frac{\pi}{6}$
(B) $\frac{\pi}{3}$
(C) $\frac{\pi}{2}$
(D) $\frac{5 \pi}{2}$
Solution:
The correct option is (B).
