Two sides and an angle are given below Determine whether the
Two sides and an angle are given below. Determine whether the given information results
Solution
Applying sine rule in the given triangle:
b/sinB = c/sinC
sinC = c*sinB/b = 7*sin20/5 =0.478
C1 = 28.60 ; C2 = 180 - 28.60 = 151.4 deg
Angle A1 = 180 - B- C1 = 131.4 deg
Angle A2 = 180 -B -C2 = 8.6 deg
Now find a1: a1/sinA1 = 5/sin20
a1 = 10.97
a2 : a2/sinA2 = 5/sin20 = 2.186
So, OPtion B : Two triangles with
C1 = 28.60 , A1 = 131.4 deg and a1 = 10.97
C2 =151.4 ; A2 = 8.6 deg and a2 =2.186
