Abstract
In two centuries ago, Ming Autu discovered the famous Catalan numbers while he tried to expand the function sin(2px) as power series of sin(x) for the case p = 1, 2, 3. Very recently, P. J. Larcombe shows that for any p, sin(2px) can always be expressed as an infinite power series of sin(x) involving precise combinations of Catalan numbers as part of all but the initial p terms and gave all expansions for the case p = 4, 5. The present paper presents the desired expansion for arbitrary integer p.
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References
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Ma, X.R. The General Solution of Ming Antu’s Problem. Acta Math Sinica 20, 157–162 (2004). https://doi.org/10.1007/s10114-003-0282-2
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DOI: https://doi.org/10.1007/s10114-003-0282-2