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Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: Domain
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[Post New]21 Apr 2008 17:00:08 IST
    Subject: Re:Domain
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sboosy (3063)

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Olaaa!! Perrrfect answer. 539  [723 rates]
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y=\sqrt{\cos^{-1}(\frac{1-|x|}{2})} \\ \\ -1\leq\frac{1-|x|}{2}\leq1 \\ \\ 1-|x|\geq-2 \ \Rightarrow |x|\leq3 \\ \\ \Rightarrow -3\leq x \leq3 \\ \\ |x|\geq -1 \ \mbox{is always true} \\ \\ \mbox{Thus} \ -3 \leq x \leq 3
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