Answer
The minimum value of a sinusoidal function is -A, where A represents the amplitude. Explanation: For functions like sine and cosine, the minimum point on the graph occurs at the negative amplitude. In the equation y(x, t) = A sin(kx Рωt + φ), A denotes the amplitude, k is the wave number, ω is the angular frequency, and φ is the phase angle. Since the sinusoidal curve swings between +A and -A, its minimum point corresponds to -A.
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