Multiple choice

In a $\triangle ABC$, if $\cot A \cot B \cot C > 0$. then the $\triangle$ is

  1. Acute angled

  2. Right angled

  3. Abtuse angles

  4. Does not exist.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a triangle, cot A * cot B * cot C > 0 implies all cotangents are positive or two are negative and one is positive. For a triangle, this condition is satisfied if the triangle is acute.