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Trigonometric Addition Formula(proof without word)
Author:
Daniel Mentrard
Topic:
Addition
,
Circle
,
Cosine
,
Ratios
,
Sine
,
Trigonometry
http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/AddtrigoformMD.html
http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/AddtrigoformMD.html
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