(1)2π/3
(2)【-π/2+2kπ,π/2+2kπ】递增,【π/2+2kπ,3π/2+2kπ】递减 (k属于整数)
(3)y(max)=2,y(min)= -2
(4) y=-2sin3x 奇函数
(5)对称中心(kπ,0);对称轴 x=kπ/2 (k属于整数)
(1)2π/3
(2)【-π/2+2kπ,π/2+2kπ】递增,【π/2+2kπ,3π/2+2kπ】递减 (k属于整数)
(3)y(max)=2,y(min)= -2
(4) y=-2sin3x 奇函数
(5)对称中心(kπ,0);对称轴 x=kπ/2 (k属于整数)