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

[@user-gw1fp6ul1s]

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

[@prajju109]

😂👍

[@burhansayedtigerboy373]

Why you are not writting exam

[@user-gw1fp6ul1s]

@@burhansayedtigerboy373 if I don't write then why should I watch this video

[@user-gw1fp6ul1s]

@@prajju109 are you from KA

[@Gamer19487]

Same bro naale exam syllabus start maadidhaste😂

[@sanadiaries3546]

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

[@varsha7264]

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...🙏

[@Doubtnut]

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[@avnishbhatt6698]

Thanks for explaining without wasting our time

[@dharshiniv9509]

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

[@ronaldraj4119]

Sir

[@Piyush.91]

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

[@sujathaborker2194]

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

[@Shamith473]

Rule hey bhai

[@EdisionDevil]

Bhai -y matlab 4th quadrant mein lie karta hai aur 4th quadrant mein cos +ve hota hai

[@vedasimhaprashanthff6600]

Thanku so much under stood very properly

[@santoshmathematicsclasses2597]

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

[@Hi-kb8et]

Measuring in clock wise direction ,so -y

[@zainabbilgi6426]

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

[@amrithapandith4449]

Thank you sir🙏🙏🙏

[@rishan8112]

thank you so much sir.wonderful explanation

[@ANONYMOUS-sj3tl]

Best doubtnut teacher

[@Anjalisharma_427]

Thanku so much

[@harpreetkaur2518]

Sir Thanks sooooooo..... Much🥰🥰🥰🥰

[@jayajyoti9969]

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

[@mr.nhgamingyt2594]

thank you sir👍

[@MrARBAZ-wg3xs]

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

[@MrARBAZ-wg3xs]

He uses AC square in LHS as well as root in RHS
Thus we use square root whenever we want to cut square from the other side.

[@sanjivkumar-nx8hq]

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

[@babusabnadaf683]

Kyunki cos -x. Remains. Cos x

[@sharathgowtham2157]

Yes

[@rakshitanaik3637]

Because cos(-x)=cosx

[@rajatthaani7725]

Quadrant se farq nhi padta ki kis quadrant me hai fark isse padta hai ki uska angle kitna us hisab se quadrant ka pata kiya jata hai.
Like- cos(-x) = cos(0-x)
So it's revolving negatively.
Note: we always suppose that x is an acute angle)
:. x is in 4th quadrant and hence it is positive

[@MadaraUchiha-mo1fn]

Thanks♥️

[@manoj_edetz]

Sir you forgotten (-)in the cos y

[@techy4250]

Thankyou Bhai ❤️

[@mightyhades4080]

very helpful thanks

[@Revannt729]

Thnk u

[@Arman-kc9wi]

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

[@chaitanyavarma3756]

Tqsm 💕sir .very helpful ✨

[@mastikafloor1501]

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

[@sumithkumar7683]

Bahut doubt harahahe sir

[@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❤

[@samrthyadav9327]

Thank you so much sir

[@victor.novorski]

Legendary Explanation.

[@manrockstar5266]

Super sir

[@aali-in6lc]

u explained what my teacher took 50 minutes to do

[@sjaswanth7293]

Thanks

[@realshot9125]

I like how se says "simple sa tha" in the end after solving 9 minutes straight

[@chandanjha8237]

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

[@SUPERNOVA0083]

nice explanation

[@khainguyen-bl6hs]

woa I don't have this in my country's textbooks

[@rajuhr6920]

This was such a good explaination

[@manishamani3261]

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

[@mohitraj8046]

Wrong English

[@sanadiaries3546]

@@mohitraj8046to theek kar usko sirf wrong bolke kya ukhaad Ilya

[@user-kt7ie5pg4f]

😂😂😂😂

[@thatsnallapanti5640]

Thanks that was really helpful

[@cricket_lover1290]

Seeing this before 1hr of exam 💀

[@tettakisaki7284]

Thx sir

[@Edwin...811]

Nice...

[@jayalaxmisathish211]

Instead of computer use pen and book

[@sushanthpoojary2952]

Hello its ok wrote good but not bad

[@Doubtnut]

We are soon launching physics and chemistry solutions on our doubtnut app and whatsapp number 8400400400. Keep studying from Doubtnut

[@noumanfarooq4353]

😂

[@deenahkhalid9961]

Thank you so muchhhhh

[@saidwarakanath8646]

Thank you

[@_priyanka_attrii]

😃😃😃😃😃

[@dikeshreddy5290]

Thank you so much sir you are the best

[@atulxenpai]

❤❤❤❤

[@Gamingzone-lb1yh]

sir i didn't understand that 1-cos(x+y) part

[@bhagyarajpawar7295]

Osm explantation dude

[@Cinephile_mp4]

Tq sir .. I understood this concept

[@chiragmishra540]

Thanx

[@Shobha-de2et]

🎉❤

[@MENtora212]

👌

[@saiaditya3036]

Thanx a lot!!

[@disha_hirwani]

1st u clear your own doubts.....
Then come to teach us.....

[@Totothetortoise-7]

Ekdum bakwas explanation

[@harbakshsingh5515]

👌👌

[@janarthanam2817]

thank u sir'

[@vaibhavganthade5128]

🙏🙏🙏🙏🍑

[@gurunathkattimani2971]

😂😂waste

[@SunilmalledaSunil]

😣😖😯

[@laxminpatil2987]

Thank you sir 🌹

[@MONSTERX-e2v]

Thank u so much sir

[@sushanthpoojary2952]

Thanks

[@Doubtnut]

We are soon launching physics and chemistry solutions on our doubtnut app and whatsapp number 8400400400. Keep studying from Doubtnut

[@rohitgr75]

@@Doubtnut ok

[@atulxenpai]

❤❤❤