tangent

FREQ #42152

a. 接触的, 正切的, 离题的 n. 切线, 正切

发音

其它 /ˈtæn.d͡ʒənt/

词形变化

tangents 复数 tangents

别名

tangeant

释义与例句

n.
  1. 1.

    A straight line touching a curve at a single point without crossing it there.

  2. 2.

    A function of an angle that gives the ratio of the sine to the cosine, in either the real or complex numbers. Symbols: tan, tg.

    切线

    数学
  3. 3.

    A topic nearly unrelated to the main topic, but having a point in common with it.

    I believe we went off onto a tangent when we started talking about monkeys on unicycles at his retirement party.

  4. 4.

    A visual interaction between two or more lines or edges that creates a perceived relationship between them, often in a way that the artist did not intend.

    艺术
  5. 5.

    A small metal blade in a clavichord that strikes the strings to produce sound.

    音乐
adj.
  1. 1.

    Touching a curve at a single point but not crossing it at that point.

    数学
  2. 2.

    Of a topic, only loosely related to a main topic.

  3. 3.

    Straight; not horizontally curved.

    交通

    The collision occurred on a two-mile stretch of tangent track.

词汇关系

名词

同义词 1

tan

上位词 3

circular function straight line trigonometric function

相关短语

tangent plane [医] 切线平面 tangent planes tangent space tangent spaces tangent bundle tangent bundles tangent line tangent lines hyperbolic tangent fly off at a tangent 突然离题 go off on a tangent go off at a tangent (说话时)突然扯到题外, 突然背离原来的途径, 突然改变行径/思想 inverse tangent 反正切 inflectional tangent flies off at a tangent

词源

Etymology tree Proto-Indo-European *teh₂g- Proto-Italic *tangō Latin tangō Latin tangēns Latin tangentembor. English tangent Borrowed from Latin tangentem, the accusative of tangēns (“touching”) (in the phrase līnea tangēns (“a touching line”)), the present participle of the verb tangō (“touch”, verb), from Proto-Italic *tangō, from Proto-Indo-European *teh₂g- (“to touch”). Cognate with Old English þaccian (“to touch lightly, pat, stroke”). More at thack, thwack.

来源：wiktionary