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sin²(x)+cos²(x)=1
Author:
Daniel Mentrard
Topic:
Cosine
,
Sine
,
Trigonometry
http://dmentrard.free.fr/GEOGEBRA/Maths/cosincarreMD.html
http://dmentrard.free.fr/GEOGEBRA/Maths/cosincarreMD.html
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