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NOTE ON THE EXPANSIONS OF SIN(A±B) AND COS(A±B)

✍ Scribed by Howard D. Grossman

Book ID
114966645
Publisher
School Science and Mathematics Association
Year
1935
Tongue
English
Weight
34 KB
Volume
35
Category
Article
ISSN
0036-6803

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📜 SIMILAR VOLUMES

The method of ascent and cos(A2+B2)
The method of ascent and cos(A2+B2)
✍ Yakar Kannai 📂 Article 📅 2000 🏛 Elsevier Science 🌐 French ⚖ 161 KB

The well-known Hadamard method of descent consists of deriving solutions of wave equations in n variables from (known) solutions in more than n variables. Here we show how to build the propagator cos( A 2 + B 2 ) out of cos(At) and cos(Bt). The formulas obtained for the case of commuting A and B may