Hi everyone, new user on here!

I have an assignment in tomorrow which i have been trying to do for months! I will give you the question and hopefully some of you might be able to help me, i will also include a picture i drew

Question

"In the diagram below (Fig 1)AB is the inclined jib of a crane and is 10m long. AC is 4m long. Using the sine rule, calculate the inclination of the jib to the vertical and the length of tie CB. "

Diagram:

Sorry its soo big. I hope someone can help me!