# Sine

Pronunciation: /saɪn/ Explain

 Click on the blue points and drag them to change the figure. For what angle is the sine zero? Manipulative 1 - Sine Created with GeoGebra.

The sine of an angle in a right triangle is defined to be equal to the length of the side opposite the angle, divided by the length of the hypotenuse.[2]

 Figure 1: Sine Equations.

### References

1. McAdams, David E.. All Math Words Dictionary, sine. 2nd Classroom edition 20150108-4799968. pg 167. Life is a Story Problem LLC. January 8, 2015. Buy the book
2. Fine, Henry B., Ph. D.. Number-System of Algebra Treated Theoretically and Historically. 2nd edition. pp 28-29,47-48. www.archive.org. D. C. Heath & Co., Boston, U.S.A.. 1907. Last Accessed 12/13/2018. http://www.archive.org/stream/thenumbersystemo17920gut/17920-pdf#page/n37/mode/1up/search/sine. Buy the book
3. Hutton, Charles. A Course in Mathematics, Volume II. 4th edition. pg 2. www.archive.org. G. & J. Robinson. 1804. Last Accessed 12/13/2018. http://www.archive.org/stream/courseofmathemat02huttrich#page/2/mode/1up/search/cosecant. Buy the book

• McAdams, David E.. Cosecant. allmathwords.org. All Math Words Encyclopedia. Life is a Story Problem LLC. 3/12/2009. http://www.allmathwords.org/en/c/cosecant.html.

McAdams, David E. Sine. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/s/sine.html.

### Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
5/5/2011: Removed broken links, updated license, implemented new markup, implemented new Geogebra app. (McAdams, David E.)