Answer
Amplitude $=4$ ; $ f=\dfrac{3}{4}$ and Period $=\dfrac{4}{3}$
Work Step by Step
Amplitude, $|A|=|-4|=4$
Given: $\omega =\dfrac{3 \pi}{2}$
So, $ f=\dfrac{\omega}{2 \pi}=\dfrac{3\pi/2}{2 \pi}=\dfrac{3}{4}$
Now, period, $ P=\dfrac{2 \pi}{\omega}=\dfrac{2 \pi}{3\pi/2}=\dfrac{4}{3}$
Hence, Amplitude $=4$ ; $ f=\dfrac{3}{4}$ and Period $=\dfrac{4}{3}$
