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Mathematics
Jean-Claude Arbaut's user avatar
Jean-Claude Arbaut's user avatar
Jean-Claude Arbaut's user avatar
Jean-Claude Arbaut
  • Member for 11 years, 11 months
  • Last seen more than a month ago
  • Besançon, France
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View all questions and answers
answer
70
Why are the trig functions versine, haversine, exsecant, etc, rarely used in modern mathematics?
Apr 17, 2019
answer
43
In plain language, what's the significance of a field?
Sep 11, 2014
answer
39
How to prove Fibonacci sequence with matrices?
May 7, 2014
answer
27
How can you derive $\sin(x) = \sin(x+2\pi)$ from the Taylor series for $\sin(x)$?
Apr 14, 2015
answer
26
Which polynomials fix the unit circle?
Aug 25, 2014
answer
25
Process to show that $\sqrt 2+\sqrt[3] 3$ is irrational
Aug 30, 2014
answer
23
How to prove that $f(f(x))=-x$ implies that $f$ is not continuous?
Nov 29, 2013
question
22
Scalar product and uniform convergence of polynomials
Dec 19, 2013
answer
22
What are primitive roots modulo n?
May 15, 2014
answer
21
Value of $f'(0)$ if $f(x)=\frac{x}{1+\frac{x}{1+\frac{x}{1+\ddots}}}$
Dec 19, 2013
Top Meta posts
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Policy on smileys?
33
Feature suggestion: marking an edit as minor to avoid messing with the question flow
31
What's with these "sangaku" geometry problems?
17
Copy of Wikipedia in tag wiki
15
Copyright and proof