sin(п/2+x)-cos(п+x)+1=0

sin(π/2 + x) - cos(π + x) + 1 = 0cosx + cosx = -12cosx = - 1cosx = -1/2x= +-arccos(-1/2) + 2πn,n ∈ Zx = +-2π/3 + 2πn, n ∈ Z