data/json/2025/math_6.txt

6. \(\cos\left(\frac{\pi}{2} + \theta\right) = -\frac{1}{5}\) 일 때, \(\frac{\sin\theta}{1 - \cos^2\theta}\) 의 값은? [3점]

\begin{itemize}
    \item[1] $-5$
    \item[2] $-\sqrt{5}$
    \item[3] $0$
    \item[4] $\sqrt{5}$
    \item[5] $5$
\end{itemize}