DERIVATION OF COSINE LAW FOR TRIANGLE | Kamaldheeriya

In this video you will learn to derive the cosine law of triangle.
In trigonometry, the law of cosines,cosine law, cosine formula, or cosine rule is an equation relating the lengths of the sides of a triangle to the cosines of one of its angles.
like sq(a) = sq(b) + sq(c) - 2bc cos A
where angle A is the angle opposite to side a.
like wise all the other cosine angle can be calculated to any triangle for watch the video.
#CosineLaw
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Keywords
Cosine rule
Cosine formula
Cosine formula proof
Cosine formula triangle
Cosine formula in hindi

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[canversillus]

Straight to the point
Great explanation

[biswanathmajumder]

It is helpful for Stewart's theorm

[AnandaChaudharyOfficial]

Sir this is very helpful & I'm going to continue this derivation:
or, b^2 + 2acCosB=c^2 + a^2
or, 2ac.CosB = c^2 + a^2 + b^2
Therefore, Cos B = c^2 + a^2 + b^2 by 2ac.
Then proved

[ramaramada]

3:57 wrong
He has supposed triangle ADC
and he wrote AC=AD +BD

[kushalsapkota]

Thank You sir...
You explained in simple way...And removed my confusion ☺️❤️

[chouhankapil]

Last m aakr btaya h ki main un formula ko proof kr rha tha...great job yar

[AryanKumar-llux]

great teaching skills, RESPECT Sir ji

[chandansah]

thanks sir this video is helpful for me

[subratacharya]

The way you have teached is really very helpful.One of the best video on this topic❤️

[AnkitMishra-sxzp]

Thank you sir very nice and helpful video

[arghyajitnayak]

Thanku Sir....this video is really helpful for me..

[discussionpointnv]

Another method is triangle Addition Of vectors

[yousense]

Owesome sir ek bar mai hi samjh ah gya

[somyaarora]

sir this is very helpful thankyou so much

[eipimath]

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.

[shantkumarbhusare]

Sir how to prove cosine rule from sine rule

[stuffy]

I want help in application of trigonometry . Can some one help me.

[ashishsatavase]

Hamare sir galat padhaye aapne sahi padhaya😃

[rajeshkumar-jvdz]

Hey here AC²=AD²+DC² not AD²+BD². AD²+BD²=AB²....!!¿!!

[pruthwirajswain]

Thank you sir for doing this video for us it will be always helpful to us