Cosine rule :b^2=a^2+c^2-2ac CosB derivation

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Properties of triangles;
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Thanks for sharing! I posted a short video on deriving the law of cosines, It should apply for all angles (acute, obtuse, reflex, negative). Hope to get your thoughts.

eipimath
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Sir Hindi bolte hoye byare lagty ho😂😂😂

ayubshaikh
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