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\[\prod _{ k=1 }^{ \infty }{ (\cos ^{ k }{ k } \times \sum _{ j=1 }^{ k }{ (\sin ^{ j }{ j } ))=? } } \]

I think the answer should be zero but I doubt.

Note by Lakshya Sinha
1 year, 5 months ago

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0 is the answer cos 90=0 Kaustubh Miglani · 1 year, 5 months ago

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