1.

If both the distinct roots of the equation `|sinx|^2+|sinx|+b=0in[0,pi]`are real, then the values of `b`are`[-2,0]`(b) `(-2,0)``[-2,0]`(d) `non eoft h e s e`A. `[-2, 0]`B. `(-2, 0)`C. `[-2, 0)`D. none of these

Answer» Correct Answer - B
Given that `|sin x|^(2)+|sin x|+b=0`
`rArr |sin x|=(-1 pm sqrt(1-4b))/2`
`rArr 0 le (-1 pm sqrt(1-4b))/2 lt 1" "rArr -2 lt b lt 0`


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