Solution: From the vertex of the catenary a line is drawn perpendicular to the tangent
Chapter 5, Problem 109(choose chapter or problem)
From the vertex (0, c) of the catenary y = c cosh(x/c) a line L is drawn perpendicular to the tangent to the catenary at point P. Prove that the length of L intercepted by the axes is equal to the ordinate y of the point P.
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