Proof of the cosine rule 

Really nice and simple, love it!🙂 Keep up the good work

Your explanation is so easy to understand. Thank you very much for the video.

This was interesting to know about. Thanks for sharing the proof with us.

The proof presupposes Pythagoras theorem which is a special case of the law of cosines, making it somewhat a circular argument. There is a proof without using Pythagoras theorem from more basic principles of Euclidean geometry.

Interesting mehn😮

Thank youu🌟❤️!

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.

Nice proof, thank you.

this was super helpful!

Thanks for the proof... I never really found interest in the actually proof after I was thought when and where it was applied... thanks cheers mate

Thanks alot i needed this

Thanks You Alive My Problem

The best. Thankyou!

Thanks Sir 🙌💯

Hi I have a question, why do you subtract equation 1 and 2 together apart from trying to get rid of h^2. How does it make actual conceptual sense, what is it showing exactly?

Why you have not put h^2=b^2--x^2 in eqn 2? This directly gives the required result which you want .make steps simple.

Thanks!

Thanks so much

For the first time i see hope

Super

Dhanyawad

wow amazing

It’s pronounced ach not hach

Why it's 2ac then Change to -2ac

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