Сколько корней уравнения tg3x=1 принадлежит промежутку [0;пи]
Tg3x=1 3x = π/4 + πn, n ∈ Z x = π/12 + πn/3, n ∈ Z при n = 0 x1 = π/12 при n = 1 x2 = π/12 + π/3 = (π + 4π)/12 = 5π/12 при n = 2 x3 = π/12 + 2π/3 = (π + 8π)/12 = 9π/12 = 3π/4 Ответ 3