Trigonometry is a branch of mathematics that deals with the relationships between angles and sides of triangles. It has wide applications in various fields including physics, engineering, and architecture. The three primary trigonometric functions are sine (sin), cosine (cos), and tangent (tan).

Sine (sin): In a right triangle, the sine of an angle is defined as the ratio of the length of the side opposite the angle to the length of the hypotenuse.

Cosine (cos): The cosine of an angle is defined as the ratio of the length of the adjacent side to the length of the hypotenuse.

Tangent (tan): The tangent of an angle is defined as the ratio of the length of the opposite side to the length of the adjacent side.

Understanding these definitions will allow us to solve various real-world problems involving right triangles and angles.

Let's dive into the world of trigonometry and explore its fascinating properties and applications!