# cosine

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## cosine:

see trigonometry**trigonometry**

[Gr.,=measurement of triangles], a specialized area of geometry concerned with the properties of and relations among the parts of a triangle. Spherical trigonometry is concerned with the study of triangles on the surface of a sphere rather than in the plane; it is

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## cosine

*of an angle*

a trigonometric function that in a right-angled triangle is the ratio of the length of the adjacent side to that of the hypotenuse; the sine of the complement

## COSINE

Cooperation for Open Systems Interconnection Networking in
Europe. A EUREKA project.

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