求最大值最小值:y=3cos3x y=-4sin(2x-π/4) y=5sin(3x+π/5) y=-3cos(2x-π/6)

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求最大值最小值:y=3cos3xy=-4sin(2x-π/4)y=5sin(3x+π/5)y=-3cos(2x-π/6)求最大值最小值:y=3cos3xy=-4sin(2x-π/4)y=5sin(3x

求最大值最小值:y=3cos3x y=-4sin(2x-π/4) y=5sin(3x+π/5) y=-3cos(2x-π/6)
求最大值最小值:y=3cos3x y=-4sin(2x-π/4) y=5sin(3x+π/5) y=-3cos(2x-π/6)

求最大值最小值:y=3cos3x y=-4sin(2x-π/4) y=5sin(3x+π/5) y=-3cos(2x-π/6)
y=3cos3x 最大值3,最小值-3
y=-4sin(2x-π/4)最大值4,最小值-4
y=5sin(3x+π/5) 最大值5,最小值-5
y=-3cos(2x-π/6)最大值3,最小值-3