Which expression is equivalent to tan(x)−tan(y)1+tan(x)tan(y)\frac{\tan(x) - \tan(y)}{1 + \tan(x)\tan(y)}1+tan(x)tan(y)tan(x)−tan(y)?
sin(x−y)\sin(x-y)sin(x−y)
tan(x+y)\tan(x+y)tan(x+y)
tan(x−y)\tan(x-y)tan(x−y)
cos(x−y)\cos(x-y)cos(x−y)