cosine

n. 余弦 [电] 余弦

发音

UK /ˈkəʊ.saɪn/
US /ˈkoʊ.saɪn/
AU /ˈkəʉ.sɑɪn/

词形变化

cosines 复数 cosines

释义与例句

n.
  1. 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

    余弦

    数学

词汇关系

名词

同义词 1

cos

上位词 2

circular function trigonometric function

相关短语

cosine rule cosine formula cosine law [计] 余弦定律 cosine curve cosine curves Fourier cosine series Lambert's cosine law hyperbolic cosine 双曲函数 inverse cosine 反余弦 coversed cosine arc cosine 反余弦 versed cosine

词源

Etymology tree Proto-Indo-European *ḱe Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- Proto-Indo-European *sinos Proto-Italic *sinus Latin sinusbor. English sine English cosine From co- + sine, short for complementi sinus in Latin, meaning “sine of the complement”. Doublet of cosinus.

来源：wiktionary