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

问题描述:

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