cosine of an angle

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• Cosine similarity — is a measure of similarity between two vectors by measuring the cosine of the angle between them. The cosine of 0 is 1, and less than 1 for any other angle. The cosine of the angle between two vectors thus determines whether two vectors are… …   Wikipedia

• cosine law — noun : either of two laws of radiation: a. : the radiant flux emitted in a given direction from a given small area of a perfectly diffusing surface varies as the cosine of the angle of emission b. : the irradiation by parallel rays falling on a… …   Useful english dictionary

• cosine — noun Etymology: New Latin cosinus, from co + Medieval Latin sinus sine Date: 1635 1. a trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle when it is considered part of a right triangle and the… …   New Collegiate Dictionary

• cosine — [kō′sīn΄] n. [ModL < co. sinus, short for complementi sinus, lit., sine of the complement] Trigonometry the reciprocal of the secant; specif. a) the ratio of the adjacent side of a given acute angle in a right triangle to the hypotenuse: see… …   English World dictionary

• Cosine — Co sine (k? s?n), n. [For co. sinus, an abbrev. of L. complementi sinus.] (Trig.) The sine of the complement of an arc or angle. See Illust. of {Functions}. [1913 Webster] …   The Collaborative International Dictionary of English

• cosine — ► NOUN Mathematics ▪ (in a right angled triangle) the ratio of the side adjacent to a particular acute angle to the hypotenuse …   English terms dictionary

• Angle — This article is about angles in geometry. For other uses, see Angle (disambiguation). Oblique angle redirects here. For the cinematographic technique, see Dutch angle. ∠, the angle symbol In geometry, an angle is the figure formed by two rays… …   Wikipedia

• cosine — UK [ˈkəʊˌsaɪn] / US [ˈkoʊˌsaɪn] noun [countable] Word forms cosine : singular cosine plural cosines maths in a right angled triangle, the measurement of an acute angle that is equal to the length of the side between the angle and the right angle… …   English dictionary

• Cosine galvanometer — Galvanometer Gal va*nom e*ter, n. [Galvanic + meter: cf. F. galvanom[ e]tre.] (Elec.) An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle. [1913 Webster] {Differential… …   The Collaborative International Dictionary of English

• cosine — co|sine [ kou,saın ] noun count in a RIGHT TRIANGLE, the measurement of an ACUTE angle that is equal to the length of the side between the angle and the right angle divided by the length of the HYPOTENUSE …   Usage of the words and phrases in modern English

• cosine — /koh suyn/, n. 1. Trigonom. a. (in a right triangle) the ratio of the side adjacent to a given angle to the hypotenuse. b. the sine of the complement of a given angle or arc. Abbr.: cos 2. Math. (of a real or complex number x) the function cos x… …   Universalium