Question

已知直线x=2π/3是函数f(x)=2sin(x/2+∮)(丨∮丨

Answer 1

x=2π/3是函数f（x）=2sin（x/2+∮）（丨∮丨＜π/2）的一条对称轴∴π/3+∮=π/2+kπ,k∈Z∮=π/6+kπ,k∈Z∵丨∮丨＜π/2∴∮=π/6f（x）=2sin（x/2+π/6）周期=2π/(1/2)=4π振幅=2初相=2sinπ/6=2*1/2=1(2)如果...