### Definition of Cosine

1. Noun. Ratio of the adjacent side to the hypotenuse of a right-angled triangle.

Exact synonyms: Cos
Generic synonyms: Circular Function, Trigonometric Function

### Definition of Cosine

1. n. The sine of the complement of an arc or angle. See Illust. of Functions.

### Definition of Cosine

1. Noun. (trigonometry) In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos ¹

2. Noun. (mathematics) The ''x'' coordinate of the point on the unit circle at the given anticlockwise angle from the ''x'' axis. ¹

3. Noun. (mathematics) The sum of the real or complex power series ¹

¹ Source: wiktionary.com

### Definition of Cosine

1. a trigonometric function of an angle [n -S]

### Cosine Pictures

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### Lexicographical Neighbors of Cosine

 cosiercosierscosiescosies upcosiestcosignatoriescosignatorycosignedcosignercosigners cosignificativecosigningcosignscosilycosine (current term)cosine formulacosine lawcosine rulecosinescosiness cosinessescosingcosinusoidalcosleepcosleepercosleeperscosleepingcosleepscoslept

### Literary usage of Cosine

Below you will find example usage of this term as found in modern and/or classical literature:

1. Mechanics' and Engineers' Pocket-book of Tables, Rules, and Formulas by Charles Haynes Haswell (1920)
"a,— What is cosine of 8° 9' io"î In right side column of proportional parta, ... Ascertain sine or cosine for angle in degrees and minutes from Table, ..."

2. Plane and Spherical Trigonometry by George Albert Wentworth (1891)
"If x be any angle in Quadrant I., sin x + cos ж must be positive since both the sine and cosine are positive. In Quadrant II. the sine is positive and ..."

3. Analytic Geometry by Wallace Alvin Wilson, Joshua Irving Tracey (1915)
"The cosine Curve. — The curve of cosines is plotted from the equation y = cos x. ... This is true because the cosine of any angle is equal to the sine of an ..."

4. Plane and Spherical Trigonometry: And Four-place Tables of Logarithms by William Anthony Granville (1909)
"General value for all angles having the same cosine or the same secant. Let x be the least positive angle whose cosine has the given value a, and consider ..."

5. A Course of Mathematics: For the Use of Academies, as Well as Private Tuition by Charles Hutton, Robert Adrain (1818)
"From which it is obvious, that if the sine and cosine of an arc, less than a quadrant, be regarded as positive, the cosine of an arc greater than \ Q and ..."

6. An Elementary Treatise on Modern Pure Geometry by Robert Lachlan (1893)
"The cosine circle is the only circle which possesses the property of cutting the sides of the triangle at the extremities of three diameters. 130. Ex. 1. ..."

7. A Treatise on Plane and Spherical Trigonometry by William Chauvenet (1856)
"2"o develop the sine and cosine of the multiple angle in a series of ascending poweri ... the angle mx q has q values which have the same sine and cosine, ..."