Answer
Amplitude $=2$ in ; Phase shift $=-2$; Period $=8$ s; Frequency $=\frac{1}{8}$ in per sec
Work Step by Step
Amplitude, $|A|=|2|=2$
So, $ f=\dfrac{\omega}{2 \pi}=\dfrac{\pi/4}{2 \pi}=\dfrac{1}{8}$
Now, Phase shift $=\dfrac{-\pi/2}{\pi/4}=-2$
and period, $ P=\dfrac{2 \pi}{\omega}=\dfrac{2 \pi}{\pi/4}=8$
Hence, Amplitude $=2$ in ; Phase shift $=-2$; Period $=8$ s; Frequency $=\frac{1}{8}$ in per sec
