Question

The value of $\frac{\cot {50}^o}{\tan {40}^o}$ is :

• A. $0$
• B. $1$
• C. $2$
• D. $3$

Answer 1

The correct option is B $1$

The value of $\frac{\cot {50}^o}{\tan {40}^o}$

$=\frac{\cot ({90}^o-{40}^o)}{\tan {40}^o}$

$=\frac{\tan {40}^o}{\tan {40}^o}=1$
$[\because \cot ({90}^o-\theta )=\tan \theta ]$