Solve triangle by either Law of Cosines or Law of Sines.

1. b = 7

c = 5

angle C = 150

2. c = 12

angle A = 140

angle C = 20

3. a = 22.3

b = 16.1

angle B = 100

4. A ship sails due west from a harbor for 22 nautical miles. It then sails 62 degrees south of west for another 15 miles. How far is the ship from the harbor?