### Functions

A mathematical function is a set of ordered pairs that assigns a unique output value to each input value. Functions are often represented by symbols, …

Trigonometry is a branch of mathematics that deals with the relationships between the sides and angles of triangles. It is used to study and solve problems involving triangles and circles, and is essential in fields such as physics, engineering, computer graphics, and navigation. Trigonometry provides tools and methods for finding angles and distances, and for modeling periodic phenomena such as waves and oscillations.