(1) A=2 两对称轴间的距离为π 则最小正周期为2π w=1 f(π/3)=2sin(π/3+φ)=1 sin(π/3+φ)=1/2sin5π/6=1/2 φ=π/2 f(x)=2sin(x+π/2)=2cosx(2) 2cosθ-sinθ=0 2cosθ=sinθ tanθ=2 cosθ=1/根号(2²+1&su...