If 2 sin^(-1)x - cos^(-1)x = pi/2, then ...

If `2 sin^(-1)x - cos^(-1)x = pi/2`, then x is equal to

A

`1//sqrt2`

B

`-1//sqrt2`

C

`-sqrt(3//2)`

D

`sqrt(3)//2`

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The correct Answer is:

D

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