Ctg1020градусов* сos1230градусов*сos2340градусов

Question

Ctg1020градусов* сos1230градусов*сos2340градусов

Answer 1

Ctg(180*6-60)*cos(360*3+150)*cos(360*6+180)=-√3/3*cos(180-30)*cos180=
=-√3/3*(-√3/2)*(-1)=-1/2