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

I think the answer should be zero but I doubt.

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

I think the answer should be zero but I doubt.

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TopNewest0 is the answer cos 90=0 – Kaustubh Miglani · 1 year, 9 months ago

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