From Longman Dictionary of Contemporary Englishcosineco‧sine /ˈkəʊsaɪn $ ˈkoʊ-/ noun [countable] technical HMthe measurement of an acute angle in a triangle with a right angle, that is calculated by dividing the length of the side next to it by the length of the hypotenuse → sine
Examples from the Corpus
cosine• Thinking these thoughts gets in the way of my learning about sines and cosines.• In this case the rotation tensor R is equal to the direction, cosine L. Example 10.• This means that one cosine has 2 associated angles.• This function returns the cosine of an angle.Origin cosine (1600-1700) Modern Latin cosinus, from co- + Medieval Latin sinus ( → SINE) 