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प्रश्न
Choose the correct alternative:
If `sin^-1x + cot^-1 (1/2) = pi/2`, then x is equal to
विकल्प
`1/2`
`1/sqrt(5)`
`2/sqrt(5)`
`sqrt(3)/5`
उत्तर
`1/sqrt(5)`
APPEARS IN
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