sin(x-1)=-sqrt(2)/2
x-1=-П/4+2Пk
x=1-П/4+2Пk
0<=1-П/4+2Пk<=2П</p>
П/4-1<=2Пk<=2П-1+П/4</p>
1/8-1/2П<=k<=1+1/8-1/2П</p>
0<=k<=1</p>
x1=1-П/4
x2=2П-П/4+1
x-1=-5П/6+2Пk
x=2Пk-5П/6+1
5П/6-1<=2Пk<=2П-1+5П/6</p>
5/12-1/(2П)<=k<=1-1/(2П)+5/12</p>
1<=k<=1</p>
k=1
x3=2П-5П/6+1