1) Cos (x/2-Пи/4)=1/2
2) Sin (5x/3+Пи/4)=-√3/2

1) x/2-pi/4=pi/3+2pinx/2=pi/3+pi/4+2pinx/2=7pi/12+2pinx=14pi/12+4pin2) 5x/3+pi/4=pi/3+pin5x/3=pi/3-pi/4+pin5x/3=pi/12+pinx=3pi/60+3pin/5