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  2. Tangent half-angle substitution - Wikipedia

    en.wikipedia.org/wiki/Tangent_half-angle...

    It is known in Russia as the universal trigonometric substitution, [6] and also known by variant names such as half-tangent substitution or half-angle substitution. It is sometimes misattributed as the Weierstrass substitution . [ 7 ]

  3. Indeterminate form - Wikipedia

    en.wikipedia.org/wiki/Indeterminate_form

    Indeterminate form is a mathematical expression that can obtain any value depending on circumstances. In calculus, it is usually possible to compute the limit of the sum, difference, product, quotient or power of two functions by taking the corresponding combination of the separate limits of each respective function.

  4. Pascaline - Wikipedia

    en.wikipedia.org/wiki/Pascaline

    Pascaline (also known as the arithmetic machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen . [ 2 ]

  5. Actual infinity - Wikipedia

    en.wikipedia.org/wiki/Actual_infinity

    The mathematical meaning of the term "actual" in actual infinity is synonymous with definite, completed, extended or existential, [13] but not to be mistaken for physically existing. The question of whether natural or real numbers form definite sets is therefore independent of the question of whether infinite things exist physically in nature .

  6. Risch algorithm - Wikipedia

    en.wikipedia.org/wiki/Risch_Algorithm

    Risch called it a decision procedure, because it is a method for deciding whether a function has an elementary function as an indefinite integral, and if it does, for determining that indefinite integral. However, the algorithm does not always succeed in identifying whether or not the antiderivative of a given function in fact can be expressed ...

  7. English determiners - Wikipedia

    en.wikipedia.org/wiki/English_determiners

    Semantically, determiners are usually definite or indefinite (e.g., the cat versus a cat), [4] and they often agree with the number of the head noun (e.g., a new cat but not *many new cat). Morphologically, they are usually simple and do not inflect. The most common of these are the definite and indefinite articles, the and a(n).

  8. Breaking Down All of Trump’s Day 1 Presidential Actions - AOL

    www.aol.com/breaking-down-trump-day-1-133059861.html

    Trump had pushed for the U.S. to leave the international health organization near the end of his first term in 2020, citing failed handling of the COVID-19 pandemic, but Biden reversed the ...

  9. Inverse Symbolic Calculator - Wikipedia

    en.wikipedia.org/wiki/Inverse_Symbolic_Calculator

    A user will input a number and the Calculator will use an algorithm to search for and calculate closed-form expressions or suitable functions that have roots near this number. Hence, the calculator is of great importance for those working in numerical areas of experimental mathematics. The ISC contains 54 million mathematical constants.