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22 E.A. Jos´ Garc´ıa

References

[1] Blue (https://math.stackexchange.com/users/409/blue), An analog of Mollweide’s Formula
for a cyclic quadrilateral, URL (version: 2022-01-14): https://math.stackexchange.com/
q/4357017

[2] J. A. Casey, Treatise On Plane Trigonometry, Hodges, Figgis, Dublin, 1888.

[3] C. V. Durell; A. Robson, Advanced Trigonometry, G. Bell and Sons, 1930.

[4] N. Karjanto, Mollweide’s formula in teaching trigonometry, Teaching Mathematics and Its
Applications 30 (2011) 70–74.

[5] R. H. Wu, The story of Mollweide and some trigonometric identities, 2007.
Available online at: https://www.geocities.ws/galois_e/pdf/mollweide%20article.
pdf