Cis函數
參考文獻

1 2 3 4  Weisstein, Eric W. (编). . at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc.  [2016-01-09]. （原始内容存档于2016-01-27） （英语）.
1 2  Simmons, Bruce. . Mathwords: Terms and Formulas from Algebra I to Calculus. Oregon City, OR, US: Clackamas Community College, Mathematics Department. 2014-07-28 [2004]  [2016-01-15]. （原始内容存档于2016-01-19）.
↑   (PDF). 5.10: 114, 117, 183, 186–187. April 2003  [2010-10-17]. （原始内容存档 (PDF)于2016-06-06）.
1 2  Hamilton, William Rowan. .  写于Dublin. Hamilton, William Edwin  (编). . University Press, Michael Henry Gill, Dublin (printer) 1. London, UK: Longmans, Green & Co. 1866-01-01: 250–257, 260, 262–263  [2016-01-17]. […] cos […] + i sin […] we shall occasionally abridge to the following: […] cis […]. As to the marks […], they are to be considered as chiefly available for the present exposition of the system, and as not often wanted, nor employed, in the subsequent practise thereof; and the same remark applies to the recent abrigdement cis, for cos + i sin […]  (, )
1 2  Stringham, Irving.  1. C. A. Mordock & Co. (printer) 1. San Francisco, US: The Berkeley Press. 1893-07-01: 71–75, 77, 79–80, 82, 84–86, 89, 91–92, 94–95, 100–102, 116, 123, 128–129, 134–135 [1891]  [2016-01-18]. As an abbreviation for cos θ + i sin θ it is convenient to use cis θ, which may be read: sector of θ.
1 2  Cajori, Florian.  2 2 (3rd corrected printing of 1929 issue). Chicago, US: Open court publishing company. 1952: 133 [March 1929]  [2016-01-18]. ISBN 978-1-60206-714-1. ISBN 1-60206-714-7. Stringham denoted cos β + i sin β by "cis β", a notation also used by Harkness and Morley.  (NB. ISBN and link for reprint of 2nd edition by Cosimo, Inc., New York, US, 2013.)
↑  Harkness, James; Morley, Frank.  1. London, UK: Macmillan and Company. 1898: 18, 22, 48, 52, 170  [2016-01-18]. ISBN 978-1-16407019-1. ISBN 1-16407019-3.  (NB. ISBN for reprint by Kessinger Publishing, 2010.)
1 2  Swokowski, Earl; Cole, Jeffery. . Precalculus Series 12 (Cengage Learning). 2011  [2016-01-18]. ISBN 978-0-84006857-6. ISBN 0-84006857-3.
1 2  L.-Rundblad, Ekaterina; Maidan, Alexei; Novak, Peter; Labunets, Valeriy. .  写于Prometheus Inc., Newport, USA. Byrnes, Jim  (编).  (PDF). NATO Science Series II: Mathematics, Physics and Chemistry (NAII) 136. Dordrecht, Netherlands: Springer Science + Business Media, Inc. 2004: 401-411  [2017-10-28]. ISBN 978-1-4020-1982-1. ISSN 1568-2609. doi:10.1007/1-4020-2307-3. （原始内容存档 (PDF)于2017-10-28）.
1 2  Kammler, David W.  2. Cambridge University Press. 2008-01-17  [2017-10-28]. ISBN 978-1-13946903-6. ISBN 1-13946903-7. （原始内容存档于2018-10-17）.
1 2  Lorenzo, Carl F.; Hartley, Tom T. . John Wiley & Sons. 2016-11-14  [2017-10-28]. ISBN 978-1-11913942-3. ISBN 1-11913942-2. （原始内容存档于2018-10-17）.
↑  Fuchs, Martin. .  (PDF) WS 2011/2012. Fachrichtung 6.1 Mathematik, Universität des Saarlandes, Germany´. 2011: 3, 13  [2016-01-15]. （原始内容 (PDF)存档于2021-07-10） （德语）.
1 2  Fuchs, Martin. .  (PDF) WS 2011/2012. Fachrichtung 6.1 Mathematik, Universität des Saarlandes, Germany´. 2011: 16–20  [2016-01-15]. （原始内容 (PDF)存档于2021-01-20） （德语）.
↑  Simmons, Bruce. . Mathwords: Terms and Formulas from Algebra I to Calculus. Oregon City, OR, US: Clackamas Community College, Mathematics Department. 2014-07-28 [2004]  [2016-01-15]. （原始内容存档于2016-01-23）.
↑  Pierce, Rod. . Maths Is Fun. 2016-01-04 [2000]  [2016-01-15]. （原始内容存档于2016-01-15）.
↑  Moskowitz, Martin A. . World Scientific Publishing Co. 2002: 7. ISBN 981-02-4780-X.
↑  Ahangar, Reza. . Journal of Applied Mathematics and Physics. 2017-01, 05: 422–438. doi:10.4236/jamp.2017.52037.
↑  Hartley, Ralph V. L. . Proceedings of the IRE. March 1942, 30 (3): 144–150  [2018-10-18]. doi:10.1109/JRPROC.1942.234333. （原始内容存档于2018-10-18）.
↑  Bracewell, Ronald N.  3. McGraw-Hill. June 1999 [1985, 1978, 1965]. ISBN 978-0-07303938-1.
cis函數 定義在複數。圖中，顏色代表辐角，高代表模
cocis函數，正好跟cis上下顛倒，周期相同，但是位移了 {\frac {\pi }{2}}