Super hard trigonometric identity proof question

Channel:
Australia Magic Monk
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Published on ● Video Link: https://www.youtube.com/watch?v=jPfrBDOe7aY


Duration: 8:08
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Feel like a brain teaser? Try this trigonometric identity proof. Expect to struggle a bit!
Thanks to one of my students who figured this out before me!



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Tags:
trigonometric identities
trigonometric proofs
trigonometric proof