Exam: SAT (English)

Definition: Something that requires a lot of money to buy or maintain; it can also mean something that causes a significant loss or sacrifice.

Example: The repairs for the old car were quite costly.

Definition: A mathematical function that represents the ratio of the length of the adjacent side to the length of the opposite side in a right-angled triangle.

Example: In trigonometry, the cotan of an angle is used to find the ratio of the adjacent side to the opposite side.

Definition: A mathematical function that represents the ratio of the length of the adjacent side to the length of the opposite side in a right triangle, or the cosine of an angle divided by its sine.

Example: In trigonometry, the cotangent of a 45-degree angle is equal to 1.

Definition: A formal dance or ball, often for young people, where they are introduced to society.

Example: The school held a cotillion to celebrate the students' graduation.

Definition: This word is used to express ability or permission in the past, show politeness, or indicate a hypothetical situation.

Example: I could help you with your homework if you want.

Definition: A person who is a member of a council, helping to make decisions and govern a community or organization.

Example: The councillor proposed a new plan to improve the local park.

Definition: A woman who is part of a group that makes decisions or gives advice, usually in a local government setting.

Example: The councilwoman proposed a new plan to improve the city's parks.

Definition: The quality of being able to be counted or numbered.

Example: In mathematics, the countability of a set determines whether its elements can be matched with the natural numbers.

Definition: Referring to items that can be counted individually, often used in mathematics to describe sets that can be matched with whole numbers.

Example: In mathematics, the set of natural numbers is countable because you can list them one by one.

Definition: To present reasons or evidence in response to an argument, aiming to show that the argument is wrong or flawed.

Example: During the debate, she decided to counterargue his points with strong evidence.