Redigerer Trigonometrisk funksjon (avsnitt)

==Litteratur==

*Abramowitz, Milton and Irene A. Stegun, ''[[Abramowitz and Stegun|Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables]]'', Dover, New York. (1964). ISBN 0-486-61272-4.
*[[Lars Ahlfors]], ''Complex Analysis: an introduction to the theory of analytic functions of one complex variable'', second edition, [[McGraw-Hill Book Company]], New York, 1966.
*[[Carl Benjamin Boyer|Boyer, Carl B.]], ''A History of Mathematics'', John Wiley & Sons, Inc., 2nd edition. (1991). ISBN 0-471-54397-7.
*Joseph, George G., ''The Crest of the Peacock: Non-European Roots of Mathematics'', 2nd ed. [[Penguin Books]], London. (2000). ISBN 0-691-00659-8.
* Kantabutra, Vitit, ”On hardware for computing exponential and trigonometric functions,” ''IEEE Trans. Computers'' '''45''' (3), 328–339 (1996).
*Maor, Eli, ''[https://web.archive.org/web/20040404234808/http://www.pupress.princeton.edu/books/maor/ Trigonometric Delights]'', Princeton Univ. Press. (1998). Reprint edition (February 25, 2002): ISBN 0-691-09541-8.
*Needham, Tristan, [https://web.archive.org/web/20040602145226/http://www.usfca.edu/vca/PDF/vca-preface.pdf ”Preface”] to ''[http://www.usfca.edu/vca/ Visual Complex Analysis]''. Oxford University Press, (1999). ISBN 0-19-853446-9.
*O’Connor, J.J., and E.F. Robertson, [https://web.archive.org/web/20130120084848/http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/Trigonometric_functions.html ”Trigonometric functions”], ''[[MacTutor History of Mathematics Archive]]''. (1996).
*O’Connor, J.J., and E.F. Robertson, [http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Madhava.html ”Madhava of Sangamagramma”] {{Wayback|url=http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Madhava.html |date=20060226001644 }}, ''[[MacTutor History of Mathematics Archive]]''. (2000).
*Pearce, Ian G., [http://www-history.mcs.st-andrews.ac.uk/history/Projects/Pearce/Chapters/Ch9_3.html ”Madhava of Sangamagramma”] {{Wayback|url=http://www-history.mcs.st-andrews.ac.uk/history/Projects/Pearce/Chapters/Ch9_3.html |date=20060505201342 }}, ''[[MacTutor History of Mathematics Archive]]''. (2002).
*Weisstein, Eric W., [http://mathworld.wolfram.com/Tangent.html ”Tangent”] from ''[[MathWorld]]'', accessed 21 January 2006.