PROOF OF COSINE RULE

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Using Algebra to proof the Cosine Rule
  1. MATHS MADE EAZY WITH PDY
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Thanks mentor you are right...well understood, viewers follow this channel

simongozah
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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