cos (x/2+p/4)+1=0 Помогите

Question

cos (x/2+p/4)+1=0 Помогите

Answer 1

cos(x/2 +pi/4)+1=0

cos(x/2 +pi/4)=-1

x/2 +pi/4=pi+2*pi*n

x/2=pi-pi/4+2*pi*n

x=2pi-pi/2 +4*pi*n

x=3pi/2 +4*pi*n