in a right-angled triangle, the measurement of an acute angle that is equal to the length of the side between the angle and the right angle divided by the length of the hypotenuse
Synonyms and related words
Describing and measuring angles
at right angles to/at a right angle to
cos
cosine
cosine
noun countable maths
US /ˈkoʊˌsaɪn/
Word Forms
singular
cosine
plural
cosines
DEFINITIONS1
1
in a right triangle, the measurement of an acute angle that is equal to the length of the side between the angle and the right angle divided by the length of the hypotenuse