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  2. Root mean square deviation - Wikipedia

    en.wikipedia.org/wiki/Root_mean_square_deviation

    This page was last edited on 18 September 2024, at 14:49 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply.

  3. Abacus - Wikipedia

    en.wikipedia.org/wiki/Abacus

    The device is then used to perform the mathematical functions of multiplication, division, addition, subtraction, square root, and cube root. [ 60 ] Although blind students have benefited from talking calculators, the abacus is often taught to these students in early grades. [ 61 ]

  4. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the "imaginary unit", that satisfies i 2 = −1.

  5. HP calculators - Wikipedia

    en.wikipedia.org/wiki/HP_calculators

    This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions, logarithms, exponentiation, and square roots. This new calculator was well received by the customer base, but William Hewlett saw additional opportunities if the ...

  6. Root-finding algorithm - Wikipedia

    en.wikipedia.org/wiki/Root-finding_algorithm

    The simplest root-finding algorithm is the bisection method.Let f be a continuous function, for which one knows an interval [a, b] such that f(a) and f(b) have opposite signs (a bracket).

  7. Stepped reckoner - Wikipedia

    en.wikipedia.org/wiki/Stepped_reckoner

    The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1]

  8. Square root of 2 - Wikipedia

    en.wikipedia.org/wiki/Square_root_of_2

    The square root of 2 (approximately 1.4142) is the positive real number that, when multiplied by itself or squared, equals the number 2.

  9. Calculator watch - Wikipedia

    en.wikipedia.org/wiki/Calculator_watch

    A HP-01 calculator watch A CFX-200 scientific calculator watch, it has trigonometric functions and scientific conversion capabilities. The μWatch, an open-source DIY scientific calculator watch Casio CMD-40 calculator watch with built-in remote control The Casio TC500 touch sensor calculator watch from 1983. It uses a capacitive touch screen ...