solve each triangle using the Law of Sines If there is no so
solve each triangle using the Law of Sines. If there is no solution, write “no solution.” Round each answer to the nearest tenth.
A = 76°, a = 15, b = 5
A = 97.5°, a = 13, b = 9
Solution
1) A = 76°, a = 15, b = 5
Apply sine rule:
a/sinA = b/sinB
sinB = 5*sin76/15 =0.3234
B1 = 18.87 deg
B2 = 180 -18.87 = 161.13 deg
A2 +B2 > 180
So, only triangle possible:
C = 180 -76 - 18.87 = 85.13 deg
c/sinC = a/sinA
c = sin85.13*15/sin76 = 15.40
2) A = 97.5°, a = 13, b = 9
a/sinA = b/sinB
sinB =0.686
B = 43.34 deg
C = 180 -97.5 - 43.34 = 39.16 deg
c/sinC = a/sinA
c =sin39.16*13/sin97.5 = 8.28
