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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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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
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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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References in periodicals archive ?
Applying IEEE standard 1547-2003 [20], for complete analysis of the signal in distributive network, 50 harmonics has to be measured, where every harmonic has it's cosine and sine component.
So with the acquisition of cosine similarity, the results can be categorized of the similarity from each word sent by the perpetrator and then implemented into the system to assist investigators in the investigation of a case of conversation, especially on text messages.
(i) In this paper, we propose sine, cosine and cotangent similarity measures under interval rough neutrosophic environment.
The amplitudes of cosine harmonics are much smaller than their periods ([[DELTA].sub.i] [much less than] [[lambda].sub.i]; where i = 1, 2...
Next, we formulate the following properties for Riemann-Liouville derivatives of the hyperbolic sine and hyperbolic cosine functions.
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:
Liu, "Parameter optimization of support vector regression based on sine cosine algorithm," Expert Systems with Applications, vol.
A cosine operator function [T.sub.h] [member of] [X] (h [greater than or equal to] 0) is defined by the properties
First, we briefly recall some definitions from the theory of cosine family [5, pp.
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.
The aim of this paper is to introduce the interval-valued intuitionistic fuzzy ordered weighted cosine similarity (IVIFOWCS) measure.