Cosine Meaning
/ˈkəʊ.saɪn/Definition, CEFR level B2, pronunciation, examples, and quiz.
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Definition
nounIn a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos
Sentence Examples
The functions sine and cosine take values between -1 and 1 (-1 and 1 included).
"Eh? Is the tangent cosine divided by sine?" "Other way round!"
The sine and cosine functions both satisfy this property.
CEFR Practice Quiz
To calculate the angle, we need the ____ of the adjacent side over the hypotenuse.
CEFR Practice Quiz (Alternate)
The functions sine and ____ take values between -1 and 1 (-1 and 1 included).
Word Origin & History
Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- Proto-Indo-European *sinos Proto-Italic *sinus Latin sinusbor. English sine English cosine From co- + sine, short for complementi sinus in Latin, meaning “sine of the complement”. Doublet of cosinus.
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CEFR Practice Quiz
To calculate the angle, we need the ____ of the adjacent side over the hypotenuse.
CEFR Practice Quiz (Alternate)
The functions sine and ____ take values between -1 and 1 (-1 and 1 included).