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  2. History of mathematical notation - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematical...

    The minus sign was used in 1489 by Johannes Widmann in Mercantile Arithmetic or Behende und hüpsche Rechenung auff allen Kauffmanschafft,. [51] Widmann used the minus symbol with the plus symbol, to indicate deficit and surplus, respectively. [52]

  3. Equals sign - Wikipedia

    en.wikipedia.org/wiki/Equals_sign

    The equals sign (British English) or equal sign (American English), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. [1] In an equation , it is placed between two expressions that have the same value, or for which one studies the conditions under which they have the ...

  4. Polarity symbols - Wikipedia

    en.wikipedia.org/wiki/Polarity_symbols

    Diagram showing positive tip polarity on the left and negative tip polarity on the right. To read diagram: The center positive drawing on the left indicates that the center (also known as the tip) of the output plug is positive (+) and the barrel (ring) of the output plug is negative (−).

  5. Vertical bar - Wikipedia

    en.wikipedia.org/wiki/Vertical_bar

    The vertical bar is used as a mathematical symbol in numerous ways. If used as a pair of brackets, it suggests the notion of the word "size". These are: absolute value: | |, read "the absolute value of x" [2]

  6. Sine and cosine - Wikipedia

    en.wikipedia.org/wiki/Sine_and_cosine

    In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that ...

  7. Greater-than sign - Wikipedia

    en.wikipedia.org/wiki/Greater-than_sign

    The greater-than sign is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the right, >, has been found in documents dated as far back as 1631. [1]

  8. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).

  9. Debits and credits - Wikipedia

    en.wikipedia.org/wiki/Debits_and_credits

    Alternatively, debits and credits can be listed in one column, indicating debits with the suffix "Dr" or writing them plain, and indicating credits with the suffix "Cr" or a minus sign. Debits and credits do not, however, correspond in a fixed way to positive and negative numbers.