Translation guide
A line that intersects a curve at two or more points, or a trigonometric function. In mathematics, the term is used in geometry and trigonometry. This guide covers both meanings.
A straight line that cuts a curve at two or more points, especially a circle.
The reciprocal of the cosine function, written as sec(θ).
The standard term for the trigonometric secant function. Often used in mathematical contexts.
In geometry, 割線 (かっせん) is the native Japanese term and is preferred in textbooks. セカント is a loanword and may be understood but is less common. For trigonometry, セカント is standard.
数学の授業では「割線」という用語を使います。
In math class, we use the term 'kassen' (secant).
Japanese often uses loanwords for trigonometric functions: サイン (sine), コサイン (cosine), タンジェント (tangent), セカント (secant), コセカント (cosecant), コタンジェント (cotangent). The kanji terms (正弦, 余弦, 正接, 正割, 余割, 余接) exist but are less common in everyday math.
A secant of a circle intersects the circumference at two points.
Loanword from English, used in some mathematical contexts, but less common than 割線.
このセカントは曲線と二点で交差している。
This secant intersects the curve at two points.
Secant is the reciprocal of cosine.
Chinese character term for secant, used in some mathematical texts, but セカント is more common in modern Japanese.
正割関数はあまり使われない。
The secant function is not used much.