Question

The value of ${\log }_{\tan {45}^{\circ }}\left(\tan {45}^{\circ }\right)$ is

• A. $1$
• B. $0$
• C. $-1$
• D. not defined

Answer 1

The correct option is D not defined

$\tan {45}^{\circ }=1$
Since, base can not be equal to $1.$
So, ${\log }_{\tan {45}^{\circ }}\left(\tan {45}^{\circ }\right)$ is not defined.