Mathematical Proofs: The Cosine Rule

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Uploaded by on Jan 11, 2009

How many times have your teacher given you a formula to use in class? How many times have you wondered where it came from? Here I will show you one of the most fantastic formula used in Mathematics! The Cosine Rule. A step by step guide as to how the Cosine rule was derived. Feel free to rewind as well as the video and learn how to prove the Cosine rule. Enjoy!!

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Education

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Top Comments

  • Beautifully explained :), im so happy i can cry. Thank you so much!!!!

  • 4:37 mindblown

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All Comments (43)

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  • 1:42 lol@BAD triangle

  • God Bless you old man.

  • now why can't my teacher explain it like that?? thanks, great video!

  • Thankyou! It was wonderfully explained and very easy to follow.

  • absolutely brilliant, thankyou thankyou thankyou :)

  • This is the best and most simplest way of proving the law. Excellent work!

  • Orange, lemon and ultra violet. Thank you.

  • you are a genius mate! good work

  • my intuition thanks you

  • The best proof yet...better than that "Khan dude....peace be with you

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