Question

In the right-angled $\Delta$ABC, $\cot A.\cot B.\cot C=...........$

• A. $1$
• B. $0$
• C. $2$
• D. None of these

Answer 1

The correct option is B $0$

ABC be a right angled triangle.
$\cot A.\cot B.\cot C=$ $\Rightarrow \frac{AB}{BC}\times 0\times \frac{BC}{AB}=0$
Hence option B is correct.