If \(\rm A = \left( {\begin{array}{*{20}{c}} 0&{\sin α }\\ {\sin α }&0 \end{array}} \right)\) and \(\rm \det \left( {{A^2} - \frac{1}{2}I} \right)=0\), then a possible value of α is:
1
\(\frac{\pi}{4}\)
2
\(\frac{\pi}{3}\)
3
\(\frac{\pi}{6}\)
4
\(\frac{\pi}{2}\)