You might object that your signal isn't a pure cosine function as the one we have shown here, and it might be very true. Still, every single sample of your signal can be described as such, i.e. with a peak amplitude times cosine of some phase angle.
Every single point of your signal can be described as the function A⋅cos(ϕ)
Since you may freely chose any amplitude A and angle ϕ this
Every single point of your signal can be described as the function A⋅cos(ϕ)
Since you may freely chose any amplitude A and angle ϕ this






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