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If a,b,c are the sides of triangle ABC s...

If a,b,c are the sides of triangle ABC satisfying `log (1 +c/a)+log a - log b = log 2.` Also `a(1 - x^2) + 2 b x+c(1 + x^2) = 0` has two equal roots. Find the value of `sin A + sin B + sin C.`

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