Meaning of the word cosine in English

What does cosine mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

cosine

US /ˈkoʊ.saɪn/
UK /ˈkəʊ.saɪn/
"cosine" picture

Noun

the trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle and the hypotenuse

Example:
The cosine of a 60-degree angle is 0.5.
You need to use the cosine rule to solve this triangle.