wtmjemma wtmjemma

03-02-2017
Mathematics

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Determine the period and frequency of the function f(x)=cos(4x)

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TheHero TheHero

03-02-2017

For a sinusoidal function

f(x) = Acos(wt + phi)

where A amplitude

w angular velocity

phi phase shift

w = 4

w = 2 pi f

f => frequency

f = 4/2pi = 0.637 hz

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