English

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:

• The x-coordinate of the point on the unit circle at the given anticlockwise angle from the x-axis.
• The sum of the real or complex power series
  
       
  
  where x is in radians.

Related terms

• arccosine
• sine

Translations

See also

• power series
• secant
• tangent
• trigonometry

Anagrams

• conies
• oscine

Italian

Noun

cosine f

1. plural of cosina

Anagrams

• cenosi, coseni, osceni

Old French

Noun

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

1. (female) cousin

Declension

• see cosin

Descendants

• French: cousine