Introduction to Trigonometry - Math is Fun
Trigonometry helps us find angles and distances, and is used a lot in science, engineering, video games, and more! The triangle of most interest is the right-angled triangle. The right angle is shown by the little box in the corner: Another angle is often labeled θ, and the three sides are then called: Why a Right-Angled Triangle?

Trigonometry - Wikipedia
Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle' and μέτρον (métron) 'measure') [1] is a branch of mathematics concerned with relationships between angles and side lengths of triangles.

Trigonometry | Definition, Formulas, Ratios, & Identities | Britannica
Trigonometry, the branch of mathematics concerned with specific functions of angles. There are six functions commonly used in trigonometry: sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc).

Trigonometry (Functions, Table, Formulas & Examples) - BYJU'S
Trigonometry is a branch that delas with the study of the relationship between sides and angles of a right triangle. Visit BYJU’S to learn the trigonometry formulas, ratios, tables, functions and examples.

Sine, Cosine and Tangent - Math is Fun
Sine, Cosine and Tangent are the main functions used in Trigonometry and are based on a Right-Angled Triangle. Before getting stuck into the functions, it helps to give a name to each side of a right triangle: Opposite is always opposite the angle. And Adjacent is always next to the angle.

Trigonometry - What is Trigonometry? Formulas, Table, Examples - Cuemath
Trigonometry is the branch of mathematics that deals with the relationship between ratios of the sides of a right-angled triangle with its angles. The ratios used to study this relationship are called trigonometric ratios, namely, sine, cosine, tangent, cotangent, secant, cosecant.

Trigonometry in Maths | Table, Formulas, Identities and Ratios
Trigonometry is a mathematical discipline that examines the relationships between the sides and angles of right-angled triangles, with practical applications in construction, navigation, and engineering.

Trigonometry - Math.net
Trigonometry (named based on a Greek word that loosely translates to "measurement of triangles") is a branch of mathematics that studies the relationships between the sides and angles of triangles. Trigonometry has many practical applications and is used in astronomy, surveying, navigation, and more.

Trigonometry | Brilliant Math & Science Wiki
Trigonometry concerns the description of angles and their related sides, particularly in triangles. While of great use in both Euclidean and analytic geometry, the domain of the trigonometric functions can also be extended to all real and complex numbers, where they become useful in differential equations and complex analysis.

Trigonometry - Angles, Triangles, Sines | Britannica
Trigonometry - Angles, Triangles, Sines: A somewhat more general concept of angle is required for trigonometry than for geometry. An angle A with vertex at V, the initial side of which is VP and the terminal side of which is VQ, is indicated in the figure by the solid circular arc.