derivations - 0.57.20210107-3 main

For various valid reasons, open-source program sources rarely derive
the mathematical formulas they use. A user, nevertheless -- not
wishing to take such formulas on faith -- might wish to see such
formulas *somewhere* derived.
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Derivations of Applied Mathematics is a book that derives, and
documents, many of the mathematical formulas and methods open-source
programs use, and indeed many of the formulas and methods used in
science and engineering generally. For example, it derives and
documents the Taylor series (used to calculate trigonometrics), the
Newton-Raphson method (used to calculate square roots), the Pythagorean
theorem (used to calculate distances) and many others.
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The book's format is PDF.