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The range of sin^(-1)[x^2+1/2]+cos^(-1)[...

The range of `sin^(-1)[x^2+1/2]+cos^(-1)[x^2-1/2]` , where [.] denotes the greatest integer function, is (a)`{pi/2,pi}` (b) `{pi}` (c) `{pi/2}` (d) none of these

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The correct Answer is:
`pi`
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