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  2. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    Illustration of angle addition formulae for the sine and cosine of acute angles. Emphasized segment is of unit length. Diagram showing the angle difference identities for sin ⁡ ( α − β ) {\displaystyle \sin(\alpha -\beta )} and cos ⁡ ( α − β ) {\displaystyle \cos(\alpha -\beta )} .

  3. Power of two - Wikipedia

    en.wikipedia.org/wiki/Power_of_two

    Visualization of powers of two from 1 to 1024 (2 0 to 2 10) as base-2 Dienes blocks. A power of two is a number of the form 2 n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent.

  4. Division (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Division_(mathematics)

    A second way to show division is to use the division sign (÷, also known as obelus though the term has additional meanings), common in arithmetic, in this manner: This form is infrequent except in elementary arithmetic. ISO 80000-2-9.6 states it should not be used.

  5. Numeracy - Wikipedia

    en.wikipedia.org/wiki/Numeracy

    Fundamental (or rudimentary) numeracy skills include understanding of the real number line, time, measurement, and estimation. [6] Fundamental skills include basic skills (the ability to identify and understand numbers) and computational skills (the ability to perform simple arithmetical operations and compare numerical magnitudes).

  6. Addition and Subtraction - Wikipedia

    en.wikipedia.org/wiki/Addition_and_Subtraction

    Addition and Subtraction (French: Tom Whisky ou L'illusioniste toqué) is a 1900 French silent trick film directed by Georges Méliès. It was released by Méliès's Star Film Company and is numbered 234 in its catalogues.

  7. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    Order of operations. In mathematics and computer programming, the order of operations is a collection of rules that reflect conventions about which operations to perform first in order to evaluate a given mathematical expression.

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