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Putnam 1939 B1

  • Session B
  1. From the vertex (0,c)(0, c) of the catenary y=ccosh⁡xcy=c \cosh \frac{x}{c} a line LL is drawn perpendicular to the tangent to the catenary at a point PP. Prove that the length of LL intercepted by the axes is equal to the ordinate yy of the point PP.

Dataset text PutnamGAP. Quoted with source.

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