Question

The value of $\cot \left({1230}^o\right)$ is

• A. $\sqrt{3}$
• B. $-\sqrt{3}$
• C. $\frac{1}{\sqrt{3}}$
• D. $-\frac{1}{\sqrt{3}}$

Answer 1

The correct option is B $-\sqrt{3}$

Now,

$\cot \left({1230}^o\right)$

$=\cot (14\times {90}^o-{30}^o)$

$=-\cot {30}^o$

$-\sqrt{3}$.