Definition from
macmillandictionary.com
sine
 definition
and synonyms
noun
[
countable
]
maths
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/
saɪn
/
singular
sine
plural
sines
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in a
right

angled
triangle
, the
measurement
of an
acute
angle
that is
equal
to the
length
of the side
opposite
the
angle
divided
by the
length
of the
hypotenuse
Synonyms and related words
Describing and measuring angles:
cos
,
cosine
,
cotangent
...
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