If \( \sum_{i=1}^{1000} \sin ^{-1} x_{i}=500 \pi \) then value of \( \sum_{i=1}^{1000} x_{i} \) ...

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If \( \sum_{i=1}^{1000} \sin ^{-1} x_{i}=500 \pi \) then value of \( \sum_{i=1}^{1000} x_{i} \)
(a) 500
(b) 100
(c) 100000
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