Ok - So we have a cord in length 5.6m, which are attached to a length 4.8m apart. A shoe is hanging off the rope 2.1m from one end.

When i'm calculating the angles that are the 2 sections of cord meet the length, is this correct...

Using the cosine rule, we can asign a = 5.6, b = 4.8, c = 2.1

So...

$\displaystyle CosA = \frac{4.8^2 + 2.1^2 - 5.6^2}{2 * 4.8 * 2.1} = -0.193948$

So $\displaystyle arccos(-0.193948) = 101.18$

I'd then do the same to find the other angle?

If not please could someone advise