*A complete lesson on sinusoidal waves and acoustics. An embedded spreadsheet provides an interactive resource for phase shifts; otherwise, this is a static text-based webpage. *

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*Wolfram's demo for the quotient rule, with dropdown menus for the functions. Users can download the free Mathematica Player to play a live version of the demo.*

*Three adjacent windows display graphs of (1) a function \(f\) and its derivative, (2) a function \(g\) and its derivative, and (3) a function \(h\) and its derivative.*

*Two adjacent windows display graphs of (1) a function \(f\) and a tangent line, and (2) the derivative \(f '\).*