Mathematics

Problem

\vec{a} + \vec{b} + \vec{c} = \vec{0}

|\vec{a}| = \sqrt{37}

|\vec{b}| = 3

and

|\vec{c}| = 4

, then angle between

\vec{b}

and

\vec{c}

is (A)

\frac{\pi}{6}

(B)

\frac{\pi}{4}

(C)

\frac{\pi}{3}

(D)

\frac{\pi}{2}