cosine
English
Cosine function
Etymology
co- + sine, short for complimenti sinus in Latin.
Pronunciation
Noun
cosine (plural cosines)
- (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
Translations
trigonometric function
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See also
Anagrams
Italian
Noun
cosine f
- plural of cosina
Anagrams
Old French
Noun
cosine f (oblique plural cosines, nominative singular cosine, nominative plural cosines)
- (female) cousin
Declension
- see cosin
Descendants
- French: cousine
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