Gaokao Math Practice Question
下列区间中，函数 $f(x)=7 \sin \left(x-\frac{\pi}{6}\right)$ 单调递增的区间是 ($\quad$)
- A.$\left(0, \frac{\pi}{2}\right)$
- B.$\left(\frac{\pi}{2}, \pi\right)$
- C.$\left(\pi, \frac{3 \pi}{2}\right)$
- D.$\left(\frac{3 \pi}{2}, 2 \pi\right)$
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