Соs 11П/6 sin 23П/4 sin 5П/3 cos 7П/4 tg -19П/3

cos (11π/6)=cos (2π-π/6)=cos (π/6); sin (23π/4)=sin (6π-π/4)=-sin (π/4); sin (5π/3)=sin (2π-π/3)=-sin (π/3); cos (7π/4)=cos (2π-π/4)=cos (π/4); tg (-19π/3)=tg (2π/3-7π)=tg (2π/3). Значения знаешь я надеюсь?