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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
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רישום חופשי
函數的單調性
函數的奇偶性
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