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  2. Division sign - Wikipedia

    en.wikipedia.org/wiki/Division_sign

    The division sign (÷) is a mathematical symbol consisting of a short horizontal line with a dot above and another dot below, used in Anglophone countries to indicate the operation of division. This usage, though widespread in some countries, is not universal and the symbol has a different meaning in other countries.

  3. SQL - Wikipedia

    en.wikipedia.org/wiki/SQL

    Structured Query Language ( SQL) ( pronounced S-Q-L; historically "sequel") [4] [5] is a domain-specific language used to manage data, especially in a relational database management system (RDBMS). It is particularly useful in handling structured data, i.e., data incorporating relations among entities and variables.

  4. Trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_functions

    The same is true for the four other trigonometric functions. By observing the sign and the monotonicity of the functions sine, cosine, cosecant, and secant in the four quadrants, one can show that is the smallest value for which they are periodic (i.e., is the fundamental period of

  5. Check mark - Wikipedia

    en.wikipedia.org/wiki/Check_mark

    ballot box with check. white heavy check mark. A check or check mark ( American English ), checkmark ( Philippine English ), tickmark ( Indian English) or tick ( Australian, New Zealand and British English) is a mark ( , , etc.) used in many countries, including the English-speaking world, to indicate the concept "yes" (e.g. "yes; this has been ...

  6. Google Sheets - Wikipedia

    en.wikipedia.org/wiki/Google_Sheets

    google .com /sheets. Google Sheets is a spreadsheet application included as part of the free, web-based Google Docs Editors suite offered by Google. Google Sheets is available as a web application; a mobile app for: Android, iOS, and as a desktop application on Google's ChromeOS. The app is compatible with Microsoft Excel file formats. [2]

  7. Gender symbol - Wikipedia

    en.wikipedia.org/wiki/Gender_symbol

    Gender symbol. The three standard sex symbols in biology are male ♂, female ♀ and hermaphroditic ⚥; originally the symbol for Mercury, ☿, was used for the last. These symbols were first used by Carl Linnaeus in 1751 to denote whether flowers were male ( stamens only), female ( pistil only) or perfect flowers with both pistils and ...

  8. Sign language - Wikipedia

    en.wikipedia.org/wiki/Sign_language

    Sign languages (also known as signed languages) are languages that use the visual-manual modality to convey meaning, instead of spoken words. Sign languages are expressed through manual articulation in combination with non-manual markers. Sign languages are full-fledged natural languages with their own grammar and lexicon. [1]

  9. Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Main_Page

    It was formed approximately 4.5 billion years ago, is a terrestrial planet and is the second smallest of the Solar System 's planets with a diameter of 6,779 km (4,212 mi). A Martian solar day ( sol) is 24.5 hours and a Martian solar year is 1.88 Earth years (687 Earth days). Mars has two small and irregular natural satellites: Phobos and Deimos.