10≤θ≤π/22cosθ=√3,θ=π/6-2ωcosθ=-2,ω=2/√32x0=[Px+(π/2)]/2, x0∈[π/2,π] ,π≤Px+π/2≤2π π/2 ≤Px≤3π/2y0=Py/2,y0=√3/2,Py=√3cos(2Px/√3+π/6)=√3/22Px/√3+π/6=11π/6Px=5π/(2√3)=(5√3/6)πx0=(5√3+3)π/12
