## Precalculus (6th Edition) Blitzer

$\approx 3.7321$
RECALL: $\cot{x} = \dfrac{1}{\tan{x}}$ Use the rule above to obtain: $\cot{(\frac{\pi}{12})}=\dfrac{1}{\tan{(\frac{\pi}{12})}}$ Use a calculator in RAD mode then round-off the answer to four decimal places to obtain: $\cot{(\frac{\pi}{12})} =2+\sqrt{3} \approx 3.7321$