Can you find the values of(adsbygoogle = window.adsbygoogle || []).push({});

[oo]

_{[pi]}cos(((-1^{n})(2n)!)^{1/(2n)})

n=0

and

[oo]

[sum] sin(((-1^{n+1})(2n+1)!)^{1/(2n+1)})

n=0

?

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# Another fundamental infinite product & summation

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