Cotangent of pi/5 in decimals.
\(\begin{array}{|rcll|} \hline && \cot(\frac{\pi}{5}) \\ &=& \cot( 36^{\circ} ) \\ &=& \frac{ 1 } { \tan(36^{\circ}) } \\ &=& \frac{ 1 } { \sqrt{5-2\cdot \sqrt{5} } } \\ &=& 1.3763819204711735382 \\ \hline \end{array}\)
