# cosine

## English

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Wikipedia

Cosine function

### Noun

cosine (plural cosines)

1. (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

#### Usage notes

In various branches of mathematics, the cosine of an angle is determined in various ways, including the following:

## Italian

### Noun

cosine f

1. Plural form of cosina

## Old French

### Noun

cosine f (oblique plural cosines, nominative singular cosine, nominative plural cosines)

1. (female) cousin