1.

The sum of the infinite seriessin−11√2+sin−1(√2−1√6)+sin−1(√3−√2√12)+⋯+sin−1(√n−√n−1√n(n+1))+⋯ is

Answer»

The sum of the infinite series

sin112+sin1(216)+sin1(3212)++sin1(nn1n(n+1))+ is



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