1.sin (x+30°) + cos (x+30°) = 0

sin(x+30°) + cos(x+30°) = 0 |:cos(x+30°)tg(x+30°) = -1x + 30° = -45° + 180°k,k ∈ Zx = -75° + 180°k,k ∈ Z