calc 3 arc length and curvature
Channel: Brian Abbott
Date: 18/05/2022

Mistake in calculation of TNB frame near end of video.  The unit normal should be vector(-sin(t), -cos(t), 0), which then impacts the calculation of the unit binormal and evaluation of these vectors at pi/2.  Corrected slides: https://www.dropbox.com/s/4kk4pfxvdjzndv4/arc_length_curvature.pdf?dl=0