The value of frac{cos30^@+isin30^@}{cos6...

The value of `frac{cos30^@+isin30^@}{cos60^@-isin60^@}` is equal to

A

i

B

`-i`

C

`frac{1+sqrt(3i)}{2}`

D

`frac{1-sqrt(3i)}{2}`

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