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Proofs Without Words

A Cosine Product Identity

Pages 329-330 | Received 31 Aug 2022, Accepted 18 Dec 2022, Published online: 12 Apr 2024

References

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  • Blum-Smith B, Wood J. Chords of an ellipse, Lucas polynomials, and cubic equations. Amer Math Monthly. 2020;127(8):688–705. DOI: 10.1080/00029890.2020.1785253.
  • Price TE. Products of chord lengths of an ellipse. Math Mag. 2002;75(4):300–307. DOI: 10.1080/0025570X.2002.11953150.

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