The irrationality measure of $\pi$ as seen through the eyes of cos($n$)

The irrationality measure of $π$ as seen through the eyes of cos( $n$ )

$The irrationality measure of $\pi$ as seen through the eyes of cos($n$) cover$

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Sully F. Chen, Erin P. J. Pearse, The irrationality measure of $π$ as seen through the eyes of cos( $n$ ). Elem. Math. 75 (2020), no. 4, pp. 152–165