Запиши ответ

Упрости выражения:

1. \(\cfrac{\tg (180\degree + \beta)\cos (180\degree - \beta)}{\tg (270\degree + \beta)\cos (270\degree + \beta)}\,\mathrlap{\,\!+}\) \( +\tg (900\degree -\beta)\) ;

2. \(\cfrac{\ctg (180\degree + \alpha)\sin (180\degree - \alpha)}{\cos (270\degree + \alpha)\sin (270\degree + \alpha)}\,\mathrlap{\,\!+}\) \( +\ctg (540\degree -\alpha)\) .

Ответ:

1. [ ];

2. [ ].