1与x轴的交点中,两个相邻的交点的距离为T/2T/2=π/2(2π/ω)*(1/2)=π/2ω=2图象上一个最低点函数值为-A-A=-2A=22x+φ=2kπ+(3π/2)φ=2kπ+(π/6)0<φ<π/2φ=π/6[2x+(π/6)]∈(π/3,7π/6)ymax=2ymin=-1
