cosine

"The adjacent room to the classroom was used for storage. "

"Professor Davies is a learned scholar, renowned for her deep knowledge of ancient history. "

"the angle between lines A and B"

"$ is the symbol for dollars in the US and some other countries."

"The doctor diagnosed Sarah with an acute case of schizophrenia. "

"a right line"

"My sister earned a degree in psychology from the university. "

"The construction paper shape was a triangle. "

"a wall divides two houses; a stream divides the towns"

"The hypotenuse of the right triangle on my math homework is the longest side. "

"The length of the classroom is 20 meters. "

"The ratio of boys to girls in the class is 2 to 3. "