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sine 音标拼音: [s'ɑɪn]

XDict

n. 正弦

PyDict

正弦

Taiwan MOE computer dictionary (moecomp)

sine
半正弦

sine
正弦

Network Terminology (netterm)

sine
正弦

WordNet (r) 3.0 (2006) (WordNet)

sine
n 1: ratio of the length of the side opposite the given angle to
the length of the hypotenuse of a right-angled triangle
[synonym: {sine}, {sin}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Sine \Sine\, n. [LL. sinus a sine, L. sinus bosom, used in
translating the Ar. jaib, properly, bosom, but probably read
by mistake (the consonants being the same) for an original
j[imac]ba sine, from Skr. j[imac]va bowstring, chord of an
arc, sine.] (Trig.)
(a) The length of a perpendicular drawn from one extremity
of an arc of a circle to the diameter drawn through
the other extremity.
(b) The perpendicular itself. See {Sine of angle}, below.
[1913 Webster]

{Artificial sines}, logarithms of the natural sines, or
logarithmic sines.

{Curve of sines}. See {Sinusoid}.

{Natural sines}, the decimals expressing the values of the
sines, the radius being unity.

{Sine of an angle}, in a circle whose radius is unity, the
sine of the arc that measures the angle; in a right-angled
triangle, the side opposite the given angle divided by the
hypotenuse. See {Trigonometrical function}, under
{Function}.

{Versed sine}, that part of the diameter between the sine and
the arc.
[1913 Webster]

Sine \Si"ne\, prep. [L.]
Without.
[1913 Webster]

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英文字典中文字典相关资料:

Trigonometric functions - Wikipedia
For an angle which, measured in degrees, is a multiple of three, the exact trigonometric values of the sine and the cosine may be expressed in terms of square roots These values of the sine and the cosine may thus be constructed by ruler and compass
Sines - Clark University
Therefore, as stated before, the sine of an angle is half the chord of twice the angle The point of this is just to show that sines are all that difficult to understand

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