Tính \(\dfrac{{\sin \alpha  + \sin \beta c{\rm{os}}\left( {\alpha  + \beta } \right)}}{{\cos \alpha  - \sin \beta \sin \left( {\alpha  + \beta } \right)}}\)

A \(\tan \left( {\alpha  + \beta } \right)\)

B \(\cot \left( {\alpha  + \beta } \right)\)

C \(\sin \left( {\alpha  + \beta } \right)\)

D \(\cos \left( {\alpha  + \beta } \right)\)