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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


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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英文字典中文字典相关资料:


  • 正切 - 维基百科,自由的百科全书
    正切(Tangent, ,东欧国家将其写作tg)是三角函数的一种。 它的 值域 是整个 实数集 , 定义域 落在 { x | x ≠ k π + π 2 , k ∈ Z } {\displaystyle \left\{x|x\neq k\pi +{\tfrac {\pi }{2}},k\in \mathbb {Z} \right\}} ( { x ∈ R | x ≠ 180 ∘ k + 90 ∘ , k ∈ Z } {\displaystyle \left\{x\in \mathbb {R
  • 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
  • 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中文(简体)翻译:剑桥词典 - Cambridge Dictionary
    TANGENT翻译:圆, 切线, 三角, 正切。 了解更多。
  • 正弦、余弦和正切 - 数学乐
    正弦 (sine), 余弦 (cosine) 和 正切 (tangent) (英语符号简写为 sin, cos 和 tan) 是 直角三角形 边长的比: 计算方法: 用一条边的长度除以另一条边的长度 例子: 35°的正弦是多少? = 0 57 = 0 82…… = 0 70…… 好的计算器都会有 sin, cos 和 tan 的键,方便计算。 你只需输入角度然后按键。 可是你还是要记得它们的意思! 用图来显示: Well Done! 怎样去记住? 想想,用这个怪怪的英文单词 "Sohcahtoa"! Soh cah 去这页 sohcahtoa 了解更多。 记住它,考试时会有用! 试试看! 试 试 看!
  • 数学 三角函数 sin 正弦、cos 余弦、tan 正切、cot 余切、sec 正割、csc 余割 简介
    正弦 (sine), 余弦 (cosine) 和 正切 (tangent) (英语符号简写为 sin, cos 和 tan) 是 直角三角形 边长的比:对一个特定的角θ来说,不论三角形的大小,这三个比是不变的sec(θ) = 斜边 邻边(=1 cos)csc(θ) = 斜边 对边(=1 sin)cot(θ) = 邻边 对边(=1 tan)在直角三角形中
  • tan 为什么称为正切?正切的解释是什么? - 知乎
    我们知道,以圆周上两点和圆心构成的三角形一定是等腰三角形,因为以圆心为端点的那两条边就是圆的半径。 而三角形的底就是弦。 而恰好,当顶角相等时,这个弦的长度与半径之比不变,而弦的长度与半径之比恰好随着顶角的大小而变化,这就构成了一种函数的关系。 起初,托勒密计算出了底腰长度之比和顶角角度之间的关系,并制作了一张数学用表,称为“全弦表”,而之后有人(我查到一个资料说是印度的数学家)将之改为了半弦表,即半底长与腰长之比和半顶角之间的关系,而后关于三角函数的知识在明崇祯时期传入我国,我国数学家将之译为“正半弦”并简称为“正弦”,“正弦”这一汉语词汇就正式诞生了。 再说“正切”,既然有“切”字,那就一定与切线有关。





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