当-π+2kπ《(π/6-4x)《0+2kπ时,单调递增此时,π/24+kπ/2《x《7π/24+kπ/2
当0+2kπ《(π/6-4x)《π+2kπ时,单调递增此时,-5π/24+kπ/2《x《π/24+kπ/2
当π/6-4x=2kπ时,y最大值=2,此时x=π/24+kπ/2
当-π+2kπ《(π/6-4x)《0+2kπ时,单调递增此时,π/24+kπ/2《x《7π/24+kπ/2
当0+2kπ《(π/6-4x)《π+2kπ时,单调递增此时,-5π/24+kπ/2《x《π/24+kπ/2
当π/6-4x=2kπ时,y最大值=2,此时x=π/24+kπ/2