Answer
$$s \approx 1.1054$$
Work Step by Step
$$\eqalign{
& \cot s = 0.5022 \cr
& {\text{Solving for }}s \cr
& s = {\tan ^{ - 1}}\left( {\frac{1}{{0.5022}}} \right) \cr
& {\text{Using a calculator into radian mode }} \cr
& s \approx 1.1054 \cr} $$
