¹ *Source: wiktionary.com*

### Definition of Cosines

**1.** cosine [n] - See also: cosine

### Cosines Pictures

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### Lexicographical Neighbors of Cosines

### Literary usage of Cosines

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

**1.** *Plane and Solid Analytic Geometry* by William Fogg Osgood, William Caspar Graustein (1921)

"CHAPTER XVIII DIRECTION **cosines**. DIRECTION COMPONENTS 1. Direction **cosines** of a
Directed Line. Given a directed line L in space; to find a means of ..."**2.** *A Treatise on the Analytic Geometry of Three Dimensions* by George Salmon (1882)

"To find the equations of the perpendicular from x'y'z on the plane Ax + By + Cz
+ D. The direction-**cosines** of the perpendicular on the plane (Art. 28) are ..."**3.** *An Elementary Treatise on Solid Geometry* by Charles Smith (1886)

"The **cosines** of the angles which a straight line makes with the positive directions
of the co-ordinate axes are called its direction-**cosines**, and we shall in ..."**4.** *Analytic Geometry and Calculus* by Frederick Shenstone Woods, Frederick Harold Bailey (1917)

"Direction **cosines**. If we denote by a, /3, and 7 the angles which a straight une
makes with the positive directions of the coordinate axes OX, OY, ..."**5.** *Solid Geometry* by Percival Frost (1875)

"To find the direction-**cosines** of a straight line perpendicular to two straight
lines whose direction-**cosines** are given. Let I, m, n, and ?, w;', ..."**6.** *Plane and Spherical Trigonometry* by Leonard Magruder Passano (1918)

"or, cos a = cos b cos c -f- sin b sin c cos A, which, proves the law of **cosines**
for all cases. We thus have the three fundamental equations, ..."**7.** *A Treatise on Infinitesimal Calculus: Containing Differential and Integral* by Bartholomew Price (1857)

"And also inversely, A, p., v can be determined in terms of the direction- **cosines**
of the new axes, and we have • (296) The changes in position which the ..."**8.** *Plane Trigonometry* by Sidney Luxton Loney (1895)

"EXPANSIONS OF SINES AND **cosines** OF MULTIPLE ANGLES, AND OF POWERS OF SINES AND
**cosines**. [On a first reading of the subject the student is recommended to ..."