Answer:
Yes. the wave is a stationary wave
Amplitude=7.91 cm
Step-by-step explanation:
We are given that an equation
![y=[8.0sin(4.0x)]cos(1.0t)](https://img.qammunity.org/2021/formulas/physics/college/9208y07637lki4fumfyybqwi3pzgubhzn8.png)
We have to find that the given wave is a stationary wave or not and find its amplitude at x=2.0 cm
We know that equation of stationary wave

Where
Amplitude=

The given equation is of the form of stationary wave equation.
By comparing we get

Substitute the value of x
Therefore, the amplitude of the wave
Amplitude=
