cosine

Etymology
en, short for in Latin, meaning “sine of the complement”. .

Noun

 * 1)  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     $$\sum_{n=0}^\infty \frac{(-1)^n x^{2n}}{(2n)!} = 1 - {x^2 \over 2} + {x^4 \over 24} - {x^6 \over 720} + {x^8 \over 40320} - \cdots $$  where x is in radians.

Translations

 * Arabic: جَيْب تَمَام
 * Armenian:
 * Basque: kosinu
 * Bulgarian: ко́синус
 * Burmese: ကိုဆိုင်း
 * Catalan: cosinus
 * Cebuano: kalidpa
 * Chinese:
 * Mandarin:
 * Czech:
 * Dutch:
 * Esperanto: kosinuso
 * Finnish:
 * French:
 * Georgian: კოსინუსი
 * German:
 * Greek:
 * Hebrew:
 * Hungarian:
 * Icelandic: kósínus
 * Irish: comhshíneas
 * Italian:
 * Japanese: ,
 * Khmer: កូស៊ីនុស
 * Korean: 코사인, 여현
 * Macedonian: косинус
 * Malay:
 * Manx: co-heenys
 * Maori: whenu
 * Norwegian:
 * Bokmål:
 * Nynorsk: cosinus
 * Polish: ,
 * Portuguese:
 * Romanian:
 * Russian:
 * Serbo-Croatian:
 * Cyrillic: ко̀синус
 * Roman:
 * Sicilian: cusinu
 * Slovak: kosínus
 * Slovene:
 * Spanish: coseno
 * Swedish:
 * Tagalog: kasinway
 * Tamil: துணைசெவ்வளை
 * Thai:
 * Ukrainian:
 * Vietnamese: côsin

Noun

 * 1) (female) cousin

Declension

 * see