Cos(x+y)=Cosx Cosy - Sinx Siny

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Important Trigonometric Identity: Proof by Geometry
  1. SyMath
  2. Just Like That Math
  3. NCERT CLASS XI
  4. CLASS 11
  5. Mathematics Class 11
  6. Linear Inequalities
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Комментарии
Автор

Tq so much sir it's really useful 🙏

sangeethagssangeethags
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The proof is beautiful and the explaining amazing
Thank you !

clementfradin
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Thank Q
Tmrw I am taking seminar on this concept
This explanation is very useful
⚡⚡⚡

Madhan-gxqt
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Great explanation, thankyou so much sir

ganeshmishra
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Seriously this was very good👍👍👍
Thank you❤🌹🙏 for this Sir.

SunilKumar-zuow
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Please make more videos on this chapter sir, , . Please 👆

somashekharspoorthi
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Thanku so much...u explained it in great detail 〽️

SnehaSingh_
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Just 2 hours before exam, ,,i understood thank u

aaryarcb
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At 15:41 how 2 got cut in front of sinx.siny

sxhia
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Thank you so much helped me a lot just watched it bfr exam

randomtalks
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Thanks sir. It is so easy. And best video neat and systematic method. Best way of teaching. Thanks helped a lot

crazyguy
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Thank you sir from the depth of the heart

Akhil-ohbi
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Wow excellent presentation sir. Grt going sir. Whata clear explanation. Explaination is from basic level. Tq sir

festofcricketbyraamu
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Thank you so much sir
This video helped me alot💙

ksprateek
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I had seen lot of videos but didn't understand but by seeing this I understand this so nicely
Thanx

prakashkumar-nzmu
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Instead of taking point P1 in 2nd quadrant shall we take in Q1

Abhilash
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You can not just randomly pick P3 and assume that it is exactly the same size as angle y. How do we choose P3 so that the -y angle it forms from !1, 0) is definitely the same size as angle y?

ClearOutSamskaras
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Sorry to say this Sir in 4th step. 2+(-2cosx cosy)+(2)sinxsiny=
I am brocket 2 who to cancelled that I want answer Sir this my request not questioning.

Praveen-trwi
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thank you for the explaination
very helpful

sudarshanv
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The best video, I've ever seen for Cos(x+y)=Cosx Cosy - Sinx SinY 💯💯
I understood clearly and completely!! Thank You❤❤

rohanxxmayer