Помогите решить, а то не пойму как решать, по таблице?

1 .Cos ( - П/6) * sin ( -П/3 ) + Tg ( - П/4 )

2. 1+ tg^2 ( - П/6 ) : ( общая черта ) 1+ ( tg^2* ( - П/6 )

3. 2 sin ( - П/6) Cos ( - П/6 ) + Tg ( - П/3) + sin^2 (- П/4 )

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