# CIRCLES | QUICK REVISION | JEE Main | JEE Advanced | BITSAT – By Nitesh Choudhary - Videos

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In this video, we will revise the topic CIRCLES.
I will start the topic by discussing the equation of circle in different forms. We will discuss – Finding centre and radius of circle if the equation is given, Equation of circle with centre and radius given, Equation of circle whose end points of diameter is given, Equation of Circle with coordinate axes, Length of x-intercept made by a circle, Length of y-intercept made by a circle, Equation of circle passing through two given points having least area / radius / perimeter.
Next, we will discuss topics related to a point and a circle. What are the conditions that needs to be applied if the point lies inside the circle, on the circle or outside the circle. We will also discuss how to find the maximum or minimum distance of a point from a circle.
Next discussion will be related to equation of tangent to a circle. First topic is, what is the condition to be applied given a line is tangent to a circle or line is chord to a circle – slope form of tangent. How to find the equation of a tangent, point of contact on circle is given i.e. point form of tangent. How to find the locus of point of intersection of two perpendicular tangents i.e. Director Circle. What is the formula to find the length of tangent from an external point to the circle. How to find the angle between tangents drawn from the external point. How to find the equation of the circle circumscribing the triangle formed by pair of tangents and the chord of contact. How to find the area of the triangle formed by pair of tangents and the chord of contact. How to find the length and equation of the chord of contact to a circle. Formula to find the equation of pair of tangents to the circle. How to find the equation of chord with middle point given and equation of normal to the circle.
Next, we will discuss different cases related to two circle. What are the conditions that needs to be applied given two circles; neither touches nor intersect each other, touches each other externally, intersect each other, touches each other internally, one circle is inside the other. We will also discuss number of common tangents in each cases. How to find the length of external or direct common tangent and the length of internal or transverse common tangent.
Next is equation of common chord and common tangent to two given circles. We will also discuss the condition such that two given circle intersect each other orthogonally i.e. tangents at their point of intersection include a right angle. At last, we will discuss different cases of family of circles – Circle Through Point Of Intersection Of Two Given Circles, Circle Through Point Of Intersection Of A Circle & A Line, Circle Through 2 Given Points A (x_1,y_1) and B(x_2,y_2), Circle Touches A Fixed Line L=0 At The Point (x_1,y_1).

By – Nitesh Choudhary
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https://www.instagram.com/coachengg

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Some Other Important Links are given below:

Mathematical Reasoning IIT JEE Lectures Playlist Link

Statistics IIT JEE Lectures Playlist Link

Sum of Series IIT JEE Concepts Playlist Link

Permutation and Combination IIT JEE Concepts Playlist Link

Binomial Theorem IIT JEE Concepts Playlist Link

Complex Numbers Maximum and Minimum Value IIT JEE Concepts Playlist Link

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1. Gaddam Ravi

thank you sir

2. Snehil Sparsh

Plz upload balance topics of physics today sir…. ?

3. SHYAM KULKARNI

how many videos ur targeting to complete before jee mains
sir videos r excellent

4. Geeky Geek

????

5. anupam kumar

very nice sir….pls upload conic section also….

6. Faded NCS

Love it

7. Ayon Chatterjee

8. Gaurav Rohilla

9. Subhajit Nandi

Sir, should I solve questions of tangents using parametric formula or slope form ?

10. Røhān Çhhābríā

Once again an extraordinary effort on your part , damn nice !

11. very helpful sir , thanks alot

12. akash gautam

thanks a lot
conic section plzz

13. Tushar kumar G

Mathematics of Coachengg is the best in india
i think
The quality of explaining is awesome

14. Aniket Kumar Ghosh

sir properties of triangle and binomial theorem and sequence and series plz…….

15. Tushar kumar G

Awesome really Plz make one video on circles discussing difficult problems
as concepts are discussed
now questions should be posted

16. Arjit Kudeshiya

awesome and thank you

17. pranav gupta

thank u sir
sir aprox how many chapters u will upload till jee mains??

18. Ananya Prakash

Sir, I have a doubt in coordination reactions, where can I email you that?

19. Bimala mondal Mondal

more similar video

20. 24/7 News

21. 24/7 News

22. shalini nigam

plz provide proper notes on conic section accordingly jee main

23. shalini nigam

these videos r very helpful for last moment quick revision thanks to provide us a quality of stuff

24. sparsh bhowmick

sir limits bhi kar diyo

25. Chanchal Sah

thankyou sir feel aa gya

26. grow_up_ boron

?????????????????????????????????????????????????……..upto INFINITY

27. Sruthy S Suresh

It will be useful for both JEE & NEET…..

28. grow_up_ boron

sir abb parabola ellipse bhi kar do plz???

29. Himanshu's Dubs

sir please! also upload rest of the chapters from conic before mains

30. FUZZY VIDEOS

will this be enough for jee mains ???

31. Madhu Chauhan

sir 2n+1/(n+1)(n+3) ka sum kaise karenge isme to difference rule bhi apply nhi ho rha h sir plz reply me

32. Chiku Raj

sir straight lines aur baki conic section ka video v upload kar digiye plzz sir only one week left

33. Chiku Raj

sir past years question bhi topic bhi topic ka jo easily scoring h

34. Gautam Mishra

Sir it would be very helpful if you provide quick revision for conic section also.

35. yuvraj singh

plz upolad conic and straight lines

36. Shubham Bhagat

Just mind blowing!!

37. Gaurav Rohilla

gazab sir, complex bhi krwado Na ese hi

38. Kalpana Kumari

thnk u sir your videos are very helpful for revision pls upload a Video for conic section and 3 d too as soon as possible

39. Harshit Srivastava

sir this is Osm…plz make videos on other chapters like this. sir , plz also make video on straight line .

40. Nandkishor Mahto

plzz Sir ellipse ka video upload kar dijiye.

41. Abhishek Singh

sor make more videos on bitsat

42. Devendra Suryawanshi

Sir i had a doubt in the following question pls help me out, pls reply

Let C be the circle centered at (1,1) and radius =1. If T is the circle centered at (0,y) passing through origin and touching the circle C externally, then the radius of T is equal to?

43. Mohan Arora

this was really helpful. Thanks a lot to your channel. pls make more such videos before jee mains this week .

44. SHUBHAM YADAV

nice vdo

45. Rahul Gautam

46. Vipul Dubey