SOLVED:Show that the curvature of a plane curve is \kappa=|d \phi / d s|, where \phi is the angle between T and \mathbf{i} ; that is, \phi is the angle of inclination
Nini the cute Kappa and Jacob the demon by Luna-cuteXD on DeviantArt
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2003/04 KEANE #10 Tottenham Hotspur Vintage KAPPA Away Football Shirt – Cult Football