1、 T=2π/ω=π ω=2 过M 所以-2=2sin(4π/3+φ) 4π/3+φ=3π/2 φ=π/6 y=2sin(2x+π/6) 2、 0<=x<=π/12 0<=2x<=π/6 π/6<=2x+π/6<=π/3 sinx在(π/6,π/3)是增函数 所以 2x+π/6=π/6,f(x)最小=1/2 2x+π/6=π/3,f(x)最大=√3/2
