ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XERqW8qUnII.html Dear u can see the following link for tangent and normal although it is not circle but cycloid, but the process is same to draw the tangent and normal....
Tomorrow I have exam and I don't even know how to draw involutes...but this vedio made my day..thank you sir especially for explaining two methods to extend the lines ...my teacher didnt even say we can do this with protractor and set squares..thank you sir❤
Dear Sumit U can Any of 8 or 12... More division will give u more accuracy... Else there is no difference between 8 or 12 divisions.. Hope u got it...All the best...