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If cot (x+y)= 1/sqrt3, cot (x-y)= sqrt3,...

If `cot (x+y)= 1/sqrt3, cot (x-y)= sqrt3`, then what are the smallest positive values of x and y respectively ?

A

`45^@, 30^@`

B

` 30^@, 45^@`

C

`15^@, 60^@`

D

`45^@, 15^@`.

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