# cosine

[koh-sahyn]

## Origin of cosine

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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for cosine

### Historical Examples of cosine

Like the functions sine and cosine, the elliptic functions have addition theorems, e.g.

The New Gresham EncyclopediaVarious

And, seating himself beside Dirrik, he began to explain the mysteries of sine, cosine and tangent.

Dry Fish and WetAnthon Bernhard Elias Nilsen

These are then respectively the sine and cosine of the angle α between the radius and one of the axes (O X).

The inventions, researches and writings of Nikola TeslaThomas Commerford Martin

Multiply this by the cosine of the angle and divide by the sine, and we shall get the value of the arc QY for the equator.

Outlines of a Mechanical Theory of StormsT. Bassnett

Nevertheless, I bear no grudge against the sine and the cosine, which I continue to hold in high esteem.

The Life of the FlyJ. Henri Fabre

## cosine

## Word Origin for cosine

C17: from New Latin cosinus; see co-, sine 1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Online Etymology Dictionary, © 2010 Douglas Harper

## cosine

[kō′sīn′]

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.