2. Let $a = \cos(\pi^{2})$. Which of the following options is correct? (1) $a = -1$ (2) $-1 < a \leq -\frac{1}{2}$ (3) $-\frac{1}{2} < a \leq 0$ (4) $0 < a \leq \frac{1}{2}$ (5) $\frac{1}{2} < a \leq 1$
& 2 & & 13 & 5 & & 25 & 6
2. Let $a = \cos(\pi^{2})$. Which of the following options is correct?\\
(1) $a = -1$\\
(2) $-1 < a \leq -\frac{1}{2}$\\
(3) $-\frac{1}{2} < a \leq 0$\\
(4) $0 < a \leq \frac{1}{2}$\\
(5) $\frac{1}{2} < a \leq 1$