In that way the tangent is at 90degrees for both major and minor axis , at all other points it is not 90 .

You can use any arbitrary length of thread but keep the distance of two focus shorter than the thread.

@@AnuragTiwariphysicshala the length of the string is just the distance between the 2 focii of the ellipse.

Thanks 🙂@@AnuragTiwariphysicshala

Dear, it is easy to draw on a copy as the dimension is much smaller than the whiteboard or blackboard. This is just a simple demonstration...

@@AnuragTiwariphysicshala sir, but smooth curve nahi aata, aur french curve use karne ke baad bhi curves seperate hi dikhte hai....

Same

​@@AnuragTiwariphysicshala coph mai pin kaise chubaye??

Try with board pins or paper pin📍

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@@AnuragTiwariphysicshala thanku

You can take any arbitrary distance ellipse will form as per that distance.

Thank You sir...❤

Thanks for watching🎉

🌹🌹🌹🌹🌹

Thanks and welcome

Thank you🙏

Thanks and welcome

Thank you dear.

Konse batch se ho???

Yes