Question

find the value of cot 10 degree*cot 30degree *cot 80degree​

Answer 1

cot 10o .cot 30o.cot 80o = cot(90o - 80o) cot 30o.cot 80o Read more on Sarthaks.com - https://www.sarthaks.com/176535/find-the-value-of-cot-10-o-cot-30-o-cot-80-o

Answer 2

$\huge\tt{solution}$

cot10° × cot30° × cot80°

cot10° × cot80° × cot30°

cot10° × cot(90° - 10°) × √3

cot10° × tan10° × √3

cot10° × 1/cot10° × √3

1 × √3

= √3