Answer
Amplitude $=8$ ; $ f=\dfrac{1}{4}$ and Period $=4$
Work Step by Step
Amplitude, $|A|=|-8|=8$
Given: $\omega =\dfrac{\pi}{2}$ and $ f=\dfrac{\omega}{2 \pi}$
So, $ f=\dfrac{\omega}{2 \pi}=\dfrac{\dfrac{\pi}{2}}{2 \pi}=\dfrac{1}{4}$
Now, period, $ P=\dfrac{2 \pi}{\omega}=\dfrac{2 \pi}{\dfrac{\pi}{2}}=4$
Hence, Amplitude $=8$ ; $ f=\dfrac{1}{4}$ and Period $=4$
