How to Prove that Pi = 4Sum{k=0,infinity}(((-1)^k)/(2k+1))

[@Jinsun202]

Very good

[@anthonyedwardstark4602]

I think you should focus on improving the audio quality and clarity of language. Even though handwriting was quite bad, everything was understood.

[@sanihastiar3635]

please, do at the whiteboard or something else