16.2 Exercise 13

A wave is modeled with the function $y \left(x , t\right) = \left(0.25 \text{m}\right) \text{cos} \left(0.30 \text{m}^{−1} x - 0.90 \text{s}^{−1} t + \frac{\pi}{3}\right) .$ Find the (a) amplitude, (b) wave number, (c) angular frequency, (d) wave speed, (e) initial phase shift, (f) wavelength, and (g) period of the wave.