sin B=sin(90 градусов-А)=cos A=0.6
cos B=корень из 1^2-0.6^2=0.8
tg B=0.6/0.8=0.75
ctg=cos/sin=0.8/0.6=1.33
∢1=∢4=150°
∢2 = 180° - ∢1 = 30°
∢2 = ∢3 = 30°
∢8=∢5 = 46°
∢7= 180° - ∢8 = 134°
∢7 = ∢6 = 134°
Ответ:∢1= 150
∢2= 30
∢3= 30
∢4= 150
∢5= 46
∢6= 134
∢7= 134
∢8=46