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2. List of trigonometric identities - Wikipedia

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

   When the direction of a Euclidean vector is represented by an angle , this is the angle determined by the free vector (starting at the origin) and the positive -unit vector. The same concept may also be applied to lines in a Euclidean space, where the angle is that determined by a parallel to the given line through the origin and the positive x ...

3. List of calculus topics - Wikipedia

   en.wikipedia.org/wiki/List_of_calculus_topics

   Elementary Calculus: An Infinitesimal Approach; Nonstandard calculus; Infinitesimal; Archimedes' use of infinitesimals; For further developments: see list of real analysis topics, list of complex analysis topics, list of multivariable calculus topics

4. Elementary Calculus: An Infinitesimal Approach - Wikipedia

   en.wikipedia.org/wiki/Elementary_Calculus:_An...

   [2] [3] [4] Keisler's student K. Sullivan, [5] as part of her PhD thesis, performed a controlled experiment involving 5 schools, which found Elementary Calculus to have advantages over the standard method of teaching calculus. [1] [6] Despite the benefits described by Sullivan, the vast majority of mathematicians have not adopted infinitesimal ...

5. Calculus Made Easy - Wikipedia

   en.wikipedia.org/wiki/Calculus_Made_Easy

   Calculus Made Easy ignores the use of limits with its epsilon-delta definition, replacing it with a method of approximating (to arbitrary precision) directly to the correct answer in the infinitesimal spirit of Leibniz, now formally justified in modern nonstandard analysis and smooth infinitesimal analysis.

6. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   It is fundamentally the study of the relationship of variables that depend on each other. Calculus was expanded in the 18th century by Euler with the introduction of the concept of a function and many other results. [40] Presently, "calculus" refers mainly to the elementary part of this theory, and "analysis" is commonly used for advanced parts ...

7. Outline of calculus - Wikipedia

   en.wikipedia.org/wiki/Outline_of_calculus

   Calculus is a branch of mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of contemporary mathematics education . Calculus has widespread applications in science , economics , and engineering and can solve many problems for which algebra alone is insufficient.