\( f(x)=\sin x \) is increasing in (a) \( \left(\frac{\pi}{2}, \pi\...

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\( f(x)=\sin x \) is increasing in
(a) \( \left(\frac{\pi}{2}, \pi\right) \)
(b) \( \left(\pi, \frac{3 \pi}{2}\right) \)
(c) \( (0, \pi) \)
(d) \( \left(\frac{-\pi}{2}, \frac{\pi}{2}\right) \)
\( \mathrm{P} \)
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