Applying Laws of Sines and Cosines Practice Test

Two ships leave port at the same time. Ship A travels at 15 mph in a direction N30°E, while Ship B travels at 20 mph in a direction S45°E. After 2 hours, what is the distance between the two ships to the nearest mile?

In triangle $$XYZ$$, you know that $$x = 20$$, $$y = 16$$, and $$\angle Z = 45°$$. When solving for angle $$X$$ using the Law of Sines after finding side $$z$$, which potential issue must you consider?