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Trigonometry
Introduction
Trigonometry is a branch of mathematics that studies triangles, particularly right triangles. Trigonometry deals with relationships between the sides and the angles of triangles and with the trigonometric functions, which describe those relationships, as well as describing angles in general and the motion of waves such as sound and light waves.
Source:
Wikipedia.org
Formulas

Basic Relationships

Pythagoras

Right Triangle

Shifts and Periodicity

Symmetry

Law of cosines

Law of sines

Law of tangents

Product to Sum

Sum to Product

Basic Trigonometric Functions

Special Trigonometric Functions

Conversion of Trigonometric Functions

Addition of Trigonometric Functions

Derivatives of Trigonometric Functions

Integrals of Trigonometric Functions
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