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Complex Roots of $\sin z = az, \cos z = az$, and $\cosh z = az$

Henry E. Fettis
Mathematics of Computation
Vol. 30, No. 135 (Jul., 1976), pp. 541-545
DOI: 10.2307/2005324
Stable URL: http://www.jstor.org/stable/2005324
Page Count: 37
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Complex Roots of $\sin z = az, \cos z = az$, and $\cosh z = az$
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Abstract

Values of the first five complex roots of the equations $\sin z = az, \cos z = az \text{and} \cosh z = az$ are given to $10S$, for $a = 10, 5, 2, 1.6, 1.2, 1(.1).3$, and selected values below.

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