Question: Mark $(\sqrt{)})$ against the correct answer in the following:
$f(x)=\sin x$ is increasing in
A. $\left(\frac{\pi}{2}, \pi\right)$
B. $\left(\pi, \frac{3 \pi}{2}\right)$
C. $(0, \pi)$
D. $\left(\frac{-\pi}{2}, \frac{\pi}{2}\right)$
Solution:
