Greek letters used in mathematics, science, and engineering

Greek letters are special letters used in mathematics, science, and engineering. They stand for different kinds of numbers and ideas. For example, in math, the Greek letter 'delta' (Δ) often means "the difference between two values" or "the change in something". In science and engineering, Greek letters are often used to stand for different kinds of variables and ideas. For example, the letter 'alpha' (α) can stand for a certain type of energy and the letter 'beta' (β) can stand for a different type of energy. Greek letters are also used as symbols in equations to represent different kinds of numbers or terms.