Respuesta :

calculista
we know that

Known two sides of a triangle and the angle between them, I can calculate the area applying the formula
Area of triangle =(1/2)*a*c*sin B

in this problem
a=1.2
c=2.1
B=5°
so
Area of triangle=(1/2)*1.2*2.1*sin 5°-----> Area=0.1098 units²

the answer is
Area=0.1098 units²