tg(x) + 3 = 0
tg(x) = -3
x = arctg(-3) + πn, n ∈ ℤ
x = -arctg(3) + πn, n ∈ ℤ
ответ: x = -arctg(3) + πn, n ∈ ℤ
tg(x) + 3 = 0
tg(x) = -3
x = arctg(-3) + πn, n ∈ ℤ
x = -arctg(3) + πn, n ∈ ℤ
ответ: x = -arctg(3) + πn, n ∈ ℤ