Example Sentences
"cos(θ) = adjacent / hypotenuse."
"Cosine is related to sine by the Pythagorean identity."
Synonyms & Related Terms
Quick Check
Which best describes the meaning of cosine?
Study Tips
To remember cosine, try writing it in a sentence of your own. Connect it to something you already know about mathematics.
Use it in conversation today — saying a word aloud three times helps lock it into long-term memory.