РЕШИТЕ ! tg57 - tg27/1+tg57*tg27

Question

РЕШИТЕ !
tg57 - tg27/1+tg57*tg27

Answer 1

Tg(a-b)=(tga-tgb)/(1+tgatgb)
(tg57 - tg27)/(1+tg57*tg27)=tg(57-27)=tg30=sqrt(3)/3