Japanese symbol for “cosine”

余弦

よげん

Romaji: yogen

cosine

In Japanese, cosine is 余弦, read よげん (yogen).

Before using these characters for a tattoo, check them with a native speaker. Dictionary words often have several meanings, and the right choice depends on context.

Meanings

n cosine (math)

Kanji and stroke order

余

too much, myself, surplus

on: ヨ
kun: あま.る、あま.り、あま.す、あんま.り

7 strokes · JLPT 2

弦

bowstring, chord, hypotenuse

on: ゲン
kun: つる

8 strokes · JLPT 1

Other Japanese words for “cosine”

Word	Reading	Meaning
コサイン	コサイン kosain	cosine

Related words

Words that share a kanji.

Word	Reading	Meaning
余裕	よゆう yoyuu	surplus; margin; leeway
余計	よけい yokei	extra; more; too much
余地	よち yochi	space; room; unused land
余り	あまり amari	remainder; remnant; rest
余る	あまる amaru	to remain; to be left over; to be in excess
余暇	よか yoka	leisure; leisure time; spare time
弦楽器	げんがっき gengakki	string instrument; stringed instrument
弦楽	げんがく gengaku	music for strings; string music

See also: Chinese symbol for “cosine”.

Data: JMdict (CC BY-SA 4.0); KANJIDIC2 (CC BY-SA 4.0); KanjiVG (CC BY-SA 3.0); wordfreq (CC BY-SA 4.0 (data)). Retrieved 2026-10-22.