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In a Delta ABC, /B=60° and /C=45&deg...

In a `Delta ABC`, `/_B=60°` and `/_C=45°`. Let `D` divides `BC` internally in the ratio `1:3`. then value of `(sin /_BAD)/(sin /_CAD)` is
(A) `sqrt(2/3)`
(B) `1/sqrt(3)`
(C) `1/sqrt(6)`
(D) `1/3`

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