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sine    音標拼音: [s'ɑɪn]
n. 正弦

正弦

sine
半正弦


sine
正弦

sine
正弦

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}]

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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