1. The problem statement, all variables and given/known data See attached image. 2. Relevant equations Sine law Cosine law 3. The attempt at a solution I'm really not sure what to do on this one. I know that the angle ABC and ACB will be the same, but after that I'm stumped. It's been a long time since I've taken a math course so I'm not sure what the relevance of the length of AD is.