Arithmetic | Trigonometry

Prosthaphaeresis

Prosthaphaeresis (from the Greek προσθαφαίρεσις) was an algorithm used in the late 16th century and early 17th century for approximate multiplication and division using formulas from trigonometry. For the 25 years preceding the invention of the logarithm in 1614, it was the only known generally applicable way of approximating products quickly. Its name comes from the Greek prosthesis (πρόσθεσις) and aphaeresis (ἀφαίρεσις), meaning addition and subtraction, two steps in the process. (Wikipedia).

Prosthaphaeresis
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prob6

From playlist everything

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Y10 Review Questions (Right-Angled Triangle Trigonometry)

More resources available at www.misterwootube.com

From playlist Trigonometry

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NEW Bedtime Procrastination Research (my paper!) #shorts

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From playlist My Research

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Longer video on Procrastination: 👀 https://youtu.be/v7RX_5eGNJM And subscribe to BrainCraft for more videos!

From playlist BrainCraft #shorts

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From playlist Biology/Genetics

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From playlist Psychology

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From playlist Health Science

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From playlist Robotics

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From playlist Fan Q&A

Related pages

Division (mathematics) | Slide rule | Multiplication | Logarithm | Nearest-neighbor interpolation | Spherical trigonometry | Linear interpolation | Trigonometry | Arc length | Algorithm | Euler's formula | Subtended angle | Multiplication algorithm