Prove that `cos(x+y)=cosxcosy-sinxsiny`

[gwfpuls]

All the best for your tomorrow's exam😂😂😂😂

[sanadiaries]

When he says “ ab Apan ” feels like a friend teaching

[varsha]

Thank u Sir ... Thank u so much... I was learning this from months but was so tough I felt but urz ans n explanation is just wow... Thank u Sir...🙏

[avnishbhatt]

Thanks for explaining without wasting our time

[dharshiniv]

I have my final exam didn't understand this proof the entire year...I finally understood....
Thank you so much sir ☺️🙏

[sujathaborker]

Sir I have a doubt, wo.. Cos of -y, is cos y or sin of -y is - sin y kyu..?

[vedasimhaprashanthff]

Thanku so much under stood very properly

[santoshmathematicsclasses]

Sir! How you took angle AOD =(-y) pls tell Sir...

[rishan]

thank you so much sir.wonderful explanation

[sanjivkumar-nxhq]

Cos(-y) third quadrant me hai, to Apne ise +ve kyu liya

[zainabbilgi]

Thank you sir, I was struggling to understand this from 3 months but today I have learnt it 😁😃😇

[Piyush.]

Thankyou sir
I was reading ncert😆🤣 lengthy laga to aa gya
Idhar ghumne🤣😂
Ab
Easy ho gya 😍🥰

[mastikafloor]

thank you so much sir you make me same thing which is given in book more asy to derivate and it became easy for me to derivate other problems also too much easily

[jayajyoti]

Very very well explained and really helpful video, thank you. 👍

[MrARBAZ-wgxs]

Did anyone identified that there is a simple mistake in the calculation of distance of that two sides?

[Arman-kcwi]

Converse is if q, then p whereas contrapositive is if not q, then not p

[MohammadSafwaanvlogs]

Sir your explanation is awesome but our lecturers thought me in different aways but i was feeling difficult When I saw your video😊 i felt easy
Thank you so much...SIR❤

[chandanjha]

clockwise is negative and anticlockwise is positive. Written correct in the video but spoken wrong.

[manishamani]

Tks sir I was not understood this concept in my class but now I understood