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∏j=1∞(cosπ2j+isinπ2j)= ?\large \prod_{j=1}^\infty \left(\cos \frac{\pi}{2^{j}} + i \sin \frac{\pi}{2^{j}} \right) = \, ? j=1∏∞(cos2jπ+isin2jπ)=?
Clarification: i=−1 i = \sqrt{-1} i=−1.
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