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Given that the sum of two waves of equal amplitude A is f(x) = 2A cos (24, - 217) 2xx] cos [(21, + 242) 2xx]

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Given that the sum of two waves of equal amplitude A is f(x) = 2A cos (24, - 217) 2xx] cos [(21, + 242) 2xx] what must the relationship between 1, and 12 be such that the resulting beat frequencies are one octave (one is twice the wavelength of the other) apart

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