Select and write the correct answer from...

Select and write the correct answer from the given alternatives in each of the following:`tan15^@=`

A

`frac(sqrt3+1)(sqrt3-1)`

B

`(frac(sqrt3-1)(2)`

C

`(frac(sqrt3-1)(sqrt3+1)`

D

`frac(1-sqrt3)(2sqrt3+1)`

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