75 Most Important Questions to Crack Section B in Class 9 Exams 2023 | Live Quiz with Khushbu Ma'am

THNKUU SO MUCH MA'AM 💜FOR THIS AMAZING SESSION...👍🏻👀💜

Ma'am u teach well today 👍💚

Khushbu mam my doubt is 👇👇
Mam if f(x)= sin x + cos x
By diffentiation we get f `(x) = cos x- sin x
Again diffentiation we get f``(x) = - sinx - cos x

Mam if x= 5π/3 , f`(x) = cos 5π/3 - sin 5π/3
= Cos ( 2π-π/3) - sin ( 2π-π/3)
= Cos π/3 - (- sin π/3)
= Cos π/3 + sin π/3
= 1/2 + √3/2
= 1+√3/2
= 1+1.732/2
= 2.732/2
=1.366
It is positive , therefore f `(x) increases
Whether I have done correctly mam 👆if it is wrong please say the correct method mam and if it is correct reply you have done correct please mam 🙏🙏🙏🥺🥺

And mam I have other doubt that is 👇👇
There is a interval mam ( 0 , 3π/4) this means angle 0° to 135° is and it mam for calculating easy whether I can take 90° from it mam 🤔🤔

There are my doubt please mam reply 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

Thank you mam for this wonderful session 🤩

Thank you ma'am ☺️

Please upload video on how to Factorisation of Root Equation

tq mam

Section C pls

Hello Mam ! When will we have ANTHE exam again ? I really want to participate

Mam when is the next session?

Hi man🙋🙋🙋🙋

Hi man🙋🙋🙋🙋🙋

I am New student 🙋🙋🙋🙋

Hello mam 🙋🙋🙋🙋🙋

Mam my bi cu

🙋🙋🙋

Hii mam

Thanku mam

Ma'am please give sample paper

Mam please proving questions!!

In q 8 why you have written y it should be x because AD=BD=CD ..

Mam in the chapter surface area cylinder is cancelled by cbse that's why you haven't taught that in explaination session.But there are those questions also in this video

Mam thankyou for the timestamps it saves a lot of time

Hiiiiuii