A sinusoidal wave traveling in the ─x direction (to the left) has an amplitude of 20.0 cm, a wavelength of 35.0 cm, and a frequency of 12.0 Hz. The transverse position of an element of the medium at t = 0, x = 0 is y = 3.00 cm, and the element has a positive velocity here.
(a) Sketch the wave at t = 0. (b) Find the angular wave number, period, angular frequency, and wave speed of the wave. (c) Write an expression for the wave function y(x, t). |

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