en.wikipedia.org/wiki/Sine

In mathematics, the sine is a trigonometric function of an angle. The sine of an
acute angle is ... 11.1.1 Partial fraction and product expansions of complex sine;
11.1.2 Usage of complex sine. 11.2...

ualr.edu/lasmoller/trig.html

The complex origins of trigonometry are embedded in the history of the ... The
earliest uses of trigonometric functions were related to the chords of a circle, and
...

www.showme.com/sh/?h=Vwmpmoy

History of Sine by Kerri Hallihan - May 15, 2013. ... Trigonometry · Trigonometric
Functions · Precalculus. Like. 0 5:16. Switch to older version player ...

hsm.stackexchange.com/questions/2148/discovery-of-sine-and-cosine

Apr 10, 2015 ... Wikipedia has a detailed article on history of trigonometry, including ... The only
trigonometric function was the chord c h d x = 2 sin ( x / 2 ) .

www-history.mcs.st-andrews.ac.uk/HistTopics/Trigonometric_functions.html

The use of trigonometric functions arises from the early connection between ...
Similarly, in terms of chords rather than sin and cos, Ptolemy knew the formulas.

www.britannica.com/topic/trigonometry

Apr 18, 2016 ... ... to calculations. There are six functions of an angle commonly used in
trigonometry.... ... 4-18-2016 See Article History. Related Topics.

www.ask.com/youtube?q=History of Sine Function&v=llA6iW043XU

Aug 15, 2011 ... http://BigBangPhysics.com The sine function can be obtained by taking ratios of
triangle sides at different angles.

mydominanthemisphere.wordpress.com/2009/08/27/the-story-of-sine/

Aug 27, 2009 ... I've been studying mathematics lately and really enjoying it. Here's an interesting
story about the history of the trigonometric function, 'sine'.

aleph0.clarku.edu/~djoyce/ma105/trighist.html

The modern trigonometrical functions are sine, cosine, tangent, and their
reciprocals, but in ancient Greek trigonometry, the chord, a more intuitive function
, was ...

www.livescience.com/51026-what-is-trigonometry.html

May 30, 2015 ... Sine, cosine and tangent are the principle trigonometric functions. ... According to
Victor Katz in “A History of Mathematics (3rd Edition)” ...