29. sin (x + π/4) = -1
x + π/4 = -π/2 + 2πn, n ∈ Z
x = -π/2 - π/4 + 2πn, n ∈ Z
x = -3π/4 + 2πn, n ∈ Z
Ответ: x = -3π/4 + 2πn, n ∈ Z