2. По теореме синусов:
AB/sinC=AC/sin B
3.6/(1/2)=4/sin B
sin B=2/ 3.6≅0.56
∠B=3°
1. 1) ∠A=180-100-50=30°
BC/sin A=AC/sin B
BC/0.5=6/0.766
BC≅3.92
2) P=8+6+3.92=17.92 p=17.92/2=8.96(полупериметр)
S=√(p*(p-AB)(p-BC)(p-AC))
S= √(8.96*(8.96-8)(8.96-3.92)(8.96-6))=√(8.96*(0.96)(5.04)(2.96)≅√128.3