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Proof without words: Law of cosinus

Author:Daniel Mentrard
Topic:Trigonometry

http://dmentrard.free.fr/GEOGEBRA/Maths/coslaw1MD.html

http://dmentrard.free.fr/GEOGEBRA/Maths/coslaw1MD.html
http://dmentrard.free.fr/GEOGEBRA/Maths/coslaw1MD.html

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