i.imgur. com / CvoC1sB.jpg

Question

I'm confused about how to submit a link, but attached is the problem because there is a diagram. I did part of it, but I'm stuck! I put in spaces.

Answer 1

Hmmm. Look at triangle CBD. You know all three sides now, so

14^2 = 13.3^2 + 12^2 - 2*13.3*12 cos CBD

Now you have ABC = ABD+DBC

Now use law of cosines again to get AC.