From a wave equation: y = 0.5sin 2π/3.2(64t

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From a wave equation: y = 0.5sin ^2π/_3.2(64t - x), the frequency of the wave is

1. 5 Hz
2. 15 Hz
3. 20 Hz
4. 25 Hz

Correct Option: C

y = 0.5 sin 2π/3.2(64t - x) Standard equation of the wave is : y = a sin 2π/λ (vt - x).
Comparing the given equation with the standard equation, we get v = 64 and λ = 3.2. Therefore, frequency .
= 64/3.2 = 20Hz.