Question

Solve the following equations
$\cot \left({570}^o\right)$

Answer 1

$\cot \left({570}^o\right)$

$\cot ({360}^o+{210}^o)$

$=\cot \left({210}^o\right)$

$=\cot (180+{30}^o)$

$=\cot {30}^o$

$=\sqrt{3}$.