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!!
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
MAAAN SO COOL, THIS IS AN AWESOME PROOF!!
you lost me why didn’t you just call b-x … y? that would be less confusing
excellent video & well explained
absolutely <3 your accent ahaha ‘pythag-oras the-orum’ and “substitute it in the equa-zion” xD
thank you so much! now i have a chance at passing my math test tomorrow!
4:37 mindblown
@frostwow even though you draw h from angle c, or whatever other angles, it doesn’t matter.
only half of a success. because drawing a unitcircle over the angle A would have proven useful.
and also exploring this case with what if we draw the line h from angle C, wouldve been interesting
but thanks anyway
this is the best video ever.
Thank you so much!!! This video deserves 1,000,000 views haaaaa
Thanks a bunch, really helped me out..
THANK YOU! maths homework Done!
Brilliant! Short and simple. Thank you very much.