Talk:Arcsin as an Integral

Limit of Sine of X over X/Geometric Proof uses Area of Sector. Area of Sector assumes the area of sector is proportional to the length of the arc. This is true. And it looks plausible on a blackboard, but it is a hand wave. The only way to prove is to do the integrals. But this would require you to do a u-substitution involving $sin$. But you can't do this because limit of sin(x)/x is used to prove the Derivative of Sine Function. I am trying to break this circularity. --Pelliott (talk) 05:19, 29 January 2019 (EST)