Consider the function $f(x)=\sin(x)$ in the interval $\bigg [\dfrac{ \pi}{4},\dfrac{7\pi}{4}\bigg ]$. The number and location(s) of the minima of this function are:
- One, at $\dfrac{\pi}{2} \\$
- One, at $\dfrac{3\pi}{2} \\$
- Two, at $\dfrac{\pi}{2}$ and $\dfrac{3\pi}{2} \\$
- Two, at $\dfrac{\pi}{4}$ and $\dfrac{3\pi}{2}$