①y﹦cosx值域为[-1,1]②y﹦cosx,x∈[-π/2,π/2]值域为[0,1]③y﹦cosx,x∈[-π/3,π]值域为[-1,1]④y﹦2sin（2x-π/3）﹢1值域为[-1,3]⑤y﹦2sin（2x-π/3）﹢1,x∈[π/3,π]2x-π/3的范围为 [π/3,5π/3]所以 2sin...