2COS(X/4-ПИ/6)=КОРЕНЬ ИЗ 3
Cos(x/4-п/6)=√3/2 х/4-п/6=+-п/6+2пn,n€z x/4=-п/6+п/6+2пn,n€z x/4=п/6+п/6+2пn,n€z x=8пn,n€z x=4п/3+8пn,n€z