Trigonometry - PYQ Boards 2 | Class 10 | Unacademy Foundation - Mathematics | Surabhi Gangwar

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Trigonometry - PYQ Boards 2 | Class 10 | Unacademy Foundation - Mathematics | Surabhi Gangwar

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies. The Greeks focused on the calculation of chords, while mathematicians in India created the earliest-known tables of values for trigonometric ratios (also called trigonometric functions) such as sine.

Trigonometry is known for its many identities, which are equations used for rewriting trigonometrical expressions to solve equations, to find a more useful expression, or to discover new relationships.

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