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B
(−12,12)
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C
[−12,12]
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D
none of these
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Solution
The correct option is C[−12,12] |sinx|≥0⇒|sinx||1+|sinx|<1 ⇒1−|sinx||1+|sinx|>0 So the given equation becomes 1−|sinx||1+|sinx|≥23 ⇒13≥|sinx||1+|sinx||