Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Modern Latin
Origin: cosinus, from co- + Medieval Latin sinus ( SINE)

cosine

 noun
     
Related topics: Maths
co‧sine [countable] technical
HM the 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]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary

Browse the dictionary