If $\frac{\sin(x+y)}{\sin(x-y)} = \frac{a+b}{a-b}$,then $\frac{\tan x}{\tan y} = $

  • A
    $\frac{b}{a}$
  • B
    $\frac{a}{b}$
  • C
    $a$
  • D
    $a^b$

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