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# Trigonometry

#### Formulae

General trigonometric identities

#### Trigonometrical Ratios

Describes the derivation of the basic ratios and their relationship one with another

#### The Trigonometry of the Triangle

The sine and cos formula; areas of triangles and an analysis of the varios circles associated with Triangles

#### Trigonometrical Formulae

A collection of formulae covering, Addition and subtraction of Sin cos and tan; Product formulae ; the solution of equations and the half angle formulae and the Inverser Ratioi