Nelsen, Roger B. A cosine product identity. (English) Zbl 07921355 Math. Mag. 97, No. 3, 329-330 (2024). MSC: 97G60 51N20 × Cite Format Result Cite Review PDF Full Text: DOI
Plaza, Ángel An interesting geometric series. (English) Zbl 07921354 Math. Mag. 97, No. 3, 328 (2024). MSC: 97I30 40A25 × Cite Format Result Cite Review PDF Full Text: DOI