По теореме синусов
AC/sin B = BC/sin A
2/sin B = √2/sin 30 = √2/(1/2) = 2√2
sin B = 2/(2√2) = 1/√2
B = 45 градусов
По теореме синусов
AC/sin B = BC/sin A
2/sin B = √2/sin 30 = √2/(1/2) = 2√2
sin B = 2/(2√2) = 1/√2
B = 45 градусов