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Shin's Useless Theorem

\( \frac{c\sin{A}}{\sin{C}} = \frac{\left(b-c\right)\left(\cos{B}-\cos{C}\right)}{\cos{\left(2B\right)}-\cos{\left(B-C\right)}}\)

Note by Tristan Shin
2 years, 10 months ago

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Can you please post a proof? Coby Tran · 9 months ago

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@Coby Tran Hmm this was 2 years ago so I don't quite recall my proof. If I rediscover it I'll share it here.

Also to note: that was when I was in 7th grade and prone to errors, so there is a high chance the property is not true :P Tristan Shin · 9 months ago

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