A \( \left(\frac{-\pi}{2}, \frac{\pi}{2}\right) \)
B \( \left[\frac{-\pi}{2}, \frac{\pi}{2}\right] \)
C \( \left(-\frac{\pi}{2}, \frac{\pi}{2}\right] \)
D \( [0, \pi] \)
Correct Answer: Option A
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