f(x)=sin2x关于O(0,0)中心对称π√A(π/8,√2/2) B(π/4,1) C(3π/8,√2/2) D(π/2,0) E(5π/8,-√2/2) F(3π/4,-1) G(7π/8,-√2/2)H(π,0)A'(-π/8,√2/2) B'(-π/4,1) C'(-3π/8,√2/2) D'(-π/2,0) E'(-5π/8,-...