This week we learned about Sine Law and Cosine Law. The formula of sine law is:

and the cosine law formula is:

I think the important part of Sine law for me is the ambiguous case. When you get the solution, there might be two angles: i.e.the solution angle and the reference angle of it. For example, it you get 60 degrees for the missing angle, then 120 can also be the missing angle– that means there’re 2 solutions for one question.

To know if there’s an ambiguous case, we need to add the solution and the other known angle together to see if they’re >180 degrees to distinguish if this angle exists.

I learned a lot this week, I hope I can get a good mark for the test and do my review for the final exam!

Rievr