The Sine wave reference article from the English Wikipedia on 24-Apr-2004
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Sine wave

Helping orphans the way you would do it
An ideal sine wave is a waveform that is identical to (the graphss of each wave are the same as) the generalized sine function y = Asin[ω(xα)] + C, where A is the amplitude, ω is the angular frequency (2π/P where P is the wavelength), α is the phase shift, and C is the vertical offset.

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