Origin of Trigonometry Formula cos (A+B), sin (A+B), cos (A-B), sin (A-B) using the Euler Formula
DOI:
https://doi.org/10.21512/emacsjournal.v7i1.12726Keywords:
Euler Formula, Trigonometric Formula, Formulas sin (A B), cos (A B), sin (A-B), cos (A-B)Abstract
This paper discusses the Origin of Trigonometric Formulas cos(A+B), sin(A+B), cos(A-B), and sin(A-B). To obtain the model, the writer uses Euler's formula e^iθ = cos θ + i .sin " θ. In this derivation we will get the formulas sin (A+B), cos (A+B), sin (A-B), and cos (A-B).
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