Apply Stewart's theorem to the diagram and we get: AB².DC+AC².BD=BC.(AD²+BD.DC) -- (i) Becase △ABC is equilateral, we have AC=AB; BC=AB; BD=BC/3=AB/3; DC=2BC/3=2AB/3; Using these in (i), we get: AB².(2AB/3)+AB².(AB/3)=AB.[AD²+(AB/3).(2AB/3)] (2/3)AB³+(1/3)AB³=AB.[AD²+(2/9)AB²] (2/3+1/3)AB³=AB.[AD²+(2/9)AB²] AB³=AB.[AD²+(2/9)AB²] Dividing throughout by AB, we get: AB²=AD²+(2/9)AB² i.e., AD²=AB²-(2/9)AB²=(1-2/9)AB²=(7/9)AB² Hence it follows that 9AD²=7AB²

It's helpful sir😊 thank you so much

Thanku sirr

thanx sir👍👍👍👍

Sir how are uploading video you only have 336 subscriber and you are uploading videos from 7 years full support sir ❤❤❤❤❤😢😢😢😢😢😢😢😢😢

Thanks Sir , Excellent Explanation !!

Thank You Sir , It Came in My Toady's Test but the values of diffrent bu now i got the Idea how to solve it 😅

Very Good Explanation Sir 😊

Really sir explained very well

My concepts are getting clear because of your content sir, Thank you so much for teaching us in free. I would suggest to get some lights so the video will be bright and good👍

Thanx for uploading- can u plz also tell the length of cables u got with the projector ?

Holika

wow looking delicious 😍😋😋😋

😂😂😂

Do you take CBSE Maths for 9th class?

Ooo tera peooh

Amazing.

Slow motion me bana chaiye tha

Good one.

very nice vedio.

😂

Sir 3 tho value Kaise Pata lage ga

Sir plez solve find value of a, b, c, by h hospital rule

सुन्दर

Sir,, when year is given in fraction like 11/2 years then how will we calculate compound interest??

CORRECTION AT 16 MINUTES & 31 SEC. Mistake : Exit Load is calculated on NAV + Dividend. CORRECTION: calculate exit load on only NAV i.e. exit load on 4,90,000 Rs/-

@R.V Sharma sir half of the problem is that many students are NRI who have to wake up from 4:30 am in chilling morning to attend the lectures....as a very obvious and natural human instinct not everyone can attend the lecture and the one's who can after attending continuos classes of other subjects aren't in the condition to pay the amount of attention required to understand the questions you teach and maybe that's why most of them are facing issues Also most of the students are confused with the annuity thing in books it's written it's paid at the end but on your first comment you mentioned that annuity due and immediate annuity are same ..thus it's a humble request please start recording your lectures just like every other teacher in symbiosis does.. without getting recorded any inappropriate words in their recording The message is from majority of the students ..kindly consider this sir

Don don don . Don ko pakarna muskil hi nahi namumkin h . Le fateh singh - hold my beer baby .😂😂🍺🍺🍺🍺

Wha ji wha , hame to kuch aur hi laga tha ye kya bawal banadiye aap 😂😂

Sir, the question at 29:40 Immediate annuities are annuities paid in the beginning of the period...so sir is the solution wrong since the question mentions immediate annuity while you've solved it for Regular Annuity? Also, The Pune University textbook as the same error throughout the exercises & the theory!!!!!

Are ye kis line mai aagye aap

Sir I had a doubt in trunkation rule! Sir there are times when there are multiple decimals during the course of solving So sir is it only the final result where we must trunkate the decimals or is it everywhere we find non terminating decimals in the solution?

CORRECTION: Annuity Due and Immediate Annuity are same. In this type the installment is deposited on the first day or in the beginning of year or annuity period. Where as , Ordinary Annuity or Regular Annuity is the type where the installment is deposited in end of year or Annuity period.

Thanku sir for this beautiful explanation

CORRECTION: 2.5 YEARS = 30 MONTHS (NOT 29)

sir @19.16 min. i have a question that 2.5 years should be... 1 year =12 months so 2.5 years = 30 months na but u have told its 29 months so can u explain how??

Thank u so much

Very nice lecture sir

You have got nice headphones sir 👍🏽

Very nicely explained...good lecture.

Fateh Singh hahahaha

Superb sirji...

Wow..... awesome concept and it's explanation

Beautiful explanations!!

Nice video

Great Going Rahul Sir

Good

kiti vazta kadhla ahe video ?

sir uper kar k kar daty

Holyshit finally understood the reason why that numerator should be 0 , my teacher is shit. Thanks buddy.