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tangent    音标拼音: [t'ændʒənt]
a. 接触的,切线的,相切的,离题的
n. 切线,正切

接触的,切线的,相切的,离题的切线,正切

tangent
正

tangent
正切 切线

tangent
n 1: a straight line or plane that touches a curve or curved
surface at a point but does not intersect it at that point
2: ratio of the opposite to the adjacent side of a right-angled
triangle [synonym: {tangent}, {tan}]

Tangent \Tan"gent\, a. [L. tangens, -entis, p. pr.]
Touching; touching at a single point; specifically (Geom.)
meeting a curve or surface at a point and having at that
point the same direction as the curve or surface; -- said of
a straight line, curve, or surface; as, a line tangent to a
curve; a curve tangent to a surface; tangent surfaces.
[1913 Webster]

{Tangent plane} (Geom.), a plane which touches a surface in a
point or line.

{Tangent scale} (Gun.), a kind of breech sight for a cannon.


{Tangent screw} (Mach.), an endless screw; a worm.
[1913 Webster]
[1913 Webster]


Tangent \Tan"gent\, n. [L. tangens, -entis, p. pr. of tangere to
touch; akin to Gr. ? having seized: cf. F. tangente. Cf.
{Attain}, {Contaminate}, {Contingent}, {Entire}, {Tact},
{Taste}, {Tax}, v. t.] (Geom.)
A tangent line curve, or surface; specifically, that portion
of the straight line tangent to a curve that is between the
point of tangency and a given line, the given line being, for
example, the axis of abscissas, or a radius of a circle
produced. See {Trigonometrical function}, under {Function}.
[1913 Webster]

{Artificial tangent}, or {Logarithmic tangent}, the logarithm
of the natural tangent of an arc.

{Natural tangent}, a decimal expressing the length of the
tangent of an arc, the radius being reckoned unity.

{Tangent galvanometer} (Elec.), a form of galvanometer having
a circular coil and a short needle, in which the tangent
of the angle of deflection of the needle is proportional
to the strength of the current.

{Tangent of an angle}, the natural tangent of the arc
subtending or measuring the angle.

{Tangent of an arc}, a right line, as ta, touching the arc of
a circle at one extremity a, and terminated by a line ct,
passing from the center through the other extremity o.
[1913 Webster]

58 Moby Thesaurus words for "tangent":
abutter, adjoiner, air line, approach, asymptote, axis, beeline,
borderer, bottleneck, bystander, chord, collision course,
concentralization, concentration, concourse, concurrence,
confluence, conflux, congress, convergence, converging, crossing,
diagonal, diameter, direct line, directrix, edge, focalization,
focus, funnel, great-circle course, hub, immediate neighbor,
looker-on, meeting, mutual approach, narrowing gap, neighbor,
neighborer, normal, onlooker, perpendicular, radius, radius vector,
right line, secant, segment, shortcut, side, spokes, straight,
straight course, straight line, straight stretch, straightaway,
streamline, transversal, vector


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  • Sine, Cosine and Tangent - Math is Fun
    Sine, Cosine and Tangent (often shortened to sin, cos and tan) are each a ratio of sides of a right angled triangle: To calculate them: Divide the length of one side by another side Example: What is the sine of 35°? Using this triangle (lengths are only to one decimal place): = 0 57 = 0 82 = 0 70
  • Tangent - Wikipedia
    In geometry, the tangent line (or simply tangent) to a plane curve at a given point is, intuitively, the straight line that "just touches" the curve at that point Leibniz defined it as the line through a pair of infinitely close points on the curve
  • TANGENT Definition Meaning - Merriam-Webster
    The meaning of TANGENT is an abrupt change of course : digression How to use tangent in a sentence
  • The Tangent Function – Mathematical Mysteries
    The word “tangent” comes from “tangens”, meaning touching or extending (the line that touches the circle at one point) The term “tangent” referring to an angle was first used by the Danish mathematician Thomas Fincke in 1583
  • What is a tangent? - gauthmath. com
    In geometry, a tangent is a line that intersects a curve at a single point, called the point of tangency It's crucial to remember that the tangent line doesn't cross the curve at that point; it simply touches it





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