Cosine

[Sarah]

The sine of the complement of an arc or angle. See Illust. ofFunctions.

[Sarah]

A trigonometric function used in connection with right triangles; best seen as a ratio of side lengths.
In basic trigonometry, it is used to determine unknown side lengths or an acute angle measurement(s). In more advanced mathematics, cosine is treated simply as a function without an apparent or direct reference to a triangle (the triangle's presence becomes assumed). Examples of this may be seen in Calculus through the process of integration. Wherein, the function cosine may only be a part of a large equation.
Cosine is one component out of a three-part acronym known as: SOHCAHTOA. The term cosine occupies the CAH, wherein the series forms: Cosine (equals) Adjacent (over) Hypotenuse.
Cosine thus represents the ratio of the Adjacent side length to the Hypotenuse side length -- this is all in relation to an (acute) angle, [theta].
When dealing with an angle measurement, x (theta), the side touching the angle is referred to as the Adjacent side; the side furthest away from the angle is referred to as the Opposite side; and, in a right triangle, the hypotenuse always remains and, simplistically, may be recognized as the diagonal side.
In mathematical procedures, cosine is abbreviated as [cos] for convenience.
Note: UrbanDictionary entries do not support Entity, Hex or Decimal browser rendering. This definition replaces the Greek small letter, theta, with an x.
However, in reality, it appears as an o or a zero with a line going horizontally through the center.

[Sarah]

A function in mathematics

[Sarah]

this word originates from this joke as it sounds like cousin

QWhat did one gangster mathmetician say to the other mathmetitian

A sup

[Sarah]

See 0.999847741

[Gregory]

The trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.

[Sonia]

(in a triangle that has one angle of 90°) the ratio of the length of the side next to an angle less than 90°, divided by the length of the hypotenuse (= the side opposite the 90° angle)