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单词 tangent
释义 tan·gent
I. \ˈtanjənt, ˈtaan-\ adjective
Etymology: Latin tangent-, tangens, present participle of tangere to touch; akin to Greek tetagōn having seized, Old English thaccian to stroke, touch gently
1.
 a. : touching at a single point
  < a straight line tangent to a curve >
 b.
  (1) : having a common tangent line at a point — used of two curves in a plane, two space curves, or a surface and a space curve
  (2) : having a common tangent plane at a point — used of two surfaces
2.
 a. : diverging from an original purpose or course : erratic
  < much of his work is chaotic and distorted by tangent obsessions — Tennessee Williams >
 b. : contiguous : being in agreement
  < subject matter tangent to the country's growth in those years — M.F.Milton >
II. noun
(-s)
Etymology: New Latin tangent-, tangens, from Latin, present participle of tangere to touch
1.
 a. : tangent line
 b. : the ordinate of any point on the terminal side of an angle divided by the nonzero abscissa of this point with the vertex coinciding with the origin of a plane rectangular coordinate system and the initial side of the angle coinciding with the positive x-axis — abbr. tan
2. : a course abruptly deviating from that previously pursued : digression, irrelevancy
 < avoid wandering off on tangents — J.F.Wharton >
 < his critics … went off at a tangent — Saul Carson >
3. : a small upright flat-ended metal pin at the inner end of a clavichord key that strikes the string to produce the musical tone and fixes the pitch by damping the string
4. : a piece of straight railroad track
III. noun
: a trigonometric function that is equal to the sine divided by the cosine for all real numbers θ for which the cosine is not equal to zero and is exactly equal to the tangent of an angle of measure θ in radians
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更新时间:2025/3/21 8:50:47