Q .     If `sin^(-1) x + sin^(-1) y = (2pi)/ 3` and `cos^(-1) x- cos^(-1) y =pi/3` Then, `(x, y)` is equal to

UPSEE 2010
A

`(0,1)`

B

`(1//2 , 1)`

C

`(1, 1//2)`

D

`(sqrt 3//2 ,1)`

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