cosine


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cosine:

see trigonometrytrigonometry
[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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

COSINE

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

In a right triangle, the ratio of the side opposite an acute angle (less than 90 degrees) and the hypotenuse. The cosine is the ratio between the adjacent side and the hypotenuse. These angular functions are used to compute circular movements.
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Next, we formulate the following properties for Riemann-Liouville derivatives of the hyperbolic sine and hyperbolic cosine functions.
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Let A = ([[mu].sub.A]([X.sub.j]), [v.sub.A]([X.sub.j])) and B = ([[mu].sub.B]([X.sub.j]), [v.sub.b]([X.sub.j])) be two IFSs in X, the cosine similarity measure between A and B is defined as follows:
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DCT can map an original data into frequency domain by cosine waveform, and conversely inverse discrete cosine transform (IDCT) transfers frequency domain data into spatial domain.
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