cosine
名词 n.
英 /ˈkəʊ.saɪn/
美 /ˈkoʊ.saɪn/|/ˈkəʉ.sɑɪn/
英文释义
名词 n.
- 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
词形变化
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.
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.
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数据来源: Wiktionary