f(x)= 2 sin ( 2x + A + π/3 )
f(-x)=-f(x)
2 sin ( -2x + A + π/3 )= - 2 sin ( 2x + A + π/3 )
- sin ( 2x - A - π/3 )= - sin ( 2x + A + π/3 )
2x - A - π/3 + 2kπ = 2x + A + π/3
A = Kπ - π/3
最小 正数 A 为 2π/3
f(x)= 2 sin ( 2x + A + π/3 )
f(-x)=-f(x)
2 sin ( -2x + A + π/3 )= - 2 sin ( 2x + A + π/3 )
- sin ( 2x - A - π/3 )= - sin ( 2x + A + π/3 )
2x - A - π/3 + 2kπ = 2x + A + π/3
A = Kπ - π/3
最小 正数 A 为 2π/3