Question

Tan 10 degree tan 20 degree tan 60 degree tan 70 degree tan 80 degree =1

Answer 1

here is your answer.....
$\tan(10) \tan(20) \tan(60) \tan(70) \tan(80) \\ = \tan(10) \tan(20) \times \sqrt{3} \times \tan(90 - 20) \tan(90 - 10) \\ = \tan(10) \tan(20) \times \sqrt{3} \times \cot(20) \cot(10) \\ = \sqrt{3}$
hope it helps...pls pls pls mark it brainliest