Find the Value Of $\sec \left[\arccos \left(\frac{-1}{2}\right)\right]$
A) 2
B) $\frac{2}{\sqrt{3}}$

Multiple Choice

Find the value of $\sec \left[\arccos \left(\frac{-1}{2}\right) \right]$ .

A) 2
B) $\frac{2}{\sqrt{3}}$
C) -2
D) $\frac{-2}{\sqrt{3}}$