Originally Posted by

**ebaines**

For (2) if you draw the free body diagram you have forces in the vertical direction: $\displaystyle T \sin \theta + T = W$ where $\displaystyle \theta$ is the angle of the string to the first support. In the horizontal direction you have $\displaystyle T \cos \theta = P$. And from the length of the string being A you have $\displaystyle \frac B {\cos \theta} + B \tan \theta = A$. From this you have enough to get the final expression, but it takes some playing around. I suggest you get this last expression into terms of $\displaystyle \cos \theta$.