Deriving the Tangent Addition Formula

An Approach to Mathematic Functions Basics

by Frank C. Fung ( 1st published in December, 2014. )

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Section XLI - Deriving the Tangent Addition Formula

Summary for the Section :

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Setting-up [ Angle ALPHA ] , [ Angle BETA ] and [ Angle PSI ] :

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Expressing the tangents of [ ALPHA / BETA / PSI ] via { Right-Angle Triangles } :

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Deriving the Tangent Addition Formula :

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go to the next section : Section XLII - The Tangent Addition Formula in Action

go to the last section : Section XL - A Statement of Purpose for Part VI

return to the MATH Functions Basics HomePage

Original dated 2014-12-07