Tg^2x-3=0, принадлежащие отрезку [0; 2п]
Tg²x-3=0 tg²x=3 tgx=√3 и tgx=-√3 x=π/3+πn,n∈Z x=-π/3+πn, n∈Z [0;2π] x∈{π/3;2π/3;4π/3;5π/3}