Ответ: t = -π/6 + πn/3, t = -π/2 + πn/3, n ∈ Z
Решаем уравнение tg²(3t + π/2) = 1/3:
Берем квадратный корень из обеих частей: tg(3t + π/2) = ±√(1/3) = ±√3 / 3
3t + π/2 = π/6 + πn, 3t + π/2 = -π/6 + πn
3t = π/6 - π/2 + πn, 3t = -π/6 - π/2 + πn
3t = -π/3 + πn, 3t = -2π/3 + πn
t = -π/9 + πn/3, t = -2π/9 + πn/3
Ответ: t = -π/9 + πn/3, t = -2π/9 + πn/3, n ∈ Z