sine
意味
- (数学で)正弦,サイン(《略》sin)
例文
"Eh? Is the tangent cosine divided by sine?" "Other way round!"
「あれ、タンジェントってサインでコサインを割るんだっけ？」「逆、逆」
語源
英語の原文（Wiktionary）
Borrowed from Latin sinus (“curve, bend; bosom”), a translation of Arabic جَيْب (jayb, “bosom”), a misidentification of the notation جيب (j-y-b), written without vowel diacritics, standing for Arabic جِيبَ (jība, “sine”), in turn from Sanskrit ज्या (jyā, “sine, chord, bowstring”) through the similar Sanskrit जीव (jīva, “sine, chord, life, existence”). Doublet of sinus.