Which of the following interval in which \( \ln \cos x \) is \( \ma...

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Which of the following interval in which \( \ln \cos x \) is
\( \mathrm{P} \)
decreasing.
W
(1) \( \left(\pi, \frac{3 \pi}{2}\right) \)
(2) \( \left(\frac{\pi}{2}, \pi\right) \)
(3) \( \left(\frac{3 \pi}{2}, 2 \pi\right) \)
(4) None of these
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