Use the Law of Sines to solve for all passible triangles tha
Use the Law of Sines to solve for all passible triangles that satisfy the given conditions. a = 20, b = 45,
Solution
a) a =20 , b =45 , A = 125 deg
sine rule: a/sinA = b/sinB
sinB = b*sinA/a = 45*sin125/20 = 1.84
since value of sin cannot be greater than zero.
So, no triangles are possible
b) a = 75 ; b= 100 A = 30 deg
sine rule : a/sinA = b/sinB
75/sin30 = 100/sinB
sinB = 100*0.5/75 = 0.67 ----> B1 = 41.81 deg
B2 = 180 -B1= 138.20 deg
Angle C1 = 180-30 -B1 = 108.19 deg
C2 = 180 -30 - B2 = 41.81 deg
Two traingle are possible with angles AB1C1 and AB2C2
