Question

cos (x/2+p/4)+1=0
Помогите

Answer 1

$cos(frac{x}{2}+frac{pi}{4})+1=0\cos(frac{x}{2}+frac{pi}{4})=-1\frac{x}{2}+frac{pi}{4}=pi+2pi *n,nin Z\frac{x}{2}=pi-frac{pi}{4}+2pi*n, nin Z\x=frac{3pi}{2}+4pi*n, nin Z$