tg15∘⋅tg25∘⋅tg35∘⋅tg85

tg15∘⋅tg25∘⋅tg35∘⋅tg85=? help pls

I do not understand what you are asking.

tg15∘⋅tg25∘⋅tg35∘⋅tg85=? help pls

$\tan(15°)\cdot \tan(25°)\cdot \tan(35°)\cdot \tan(85°)=1$