求y=3sin(-2x+π/3)的单调区间和对称轴

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求y=3sin(-2x+π/3)的单调区间和对称轴求y=3sin(-2x+π/3)的单调区间和对称轴求y=3sin(-2x+π/3)的单调区间和对称轴y=-3sin(2x-π/3)-π/2+2kπ<2

求y=3sin(-2x+π/3)的单调区间和对称轴
求y=3sin(-2x+π/3)的单调区间和对称轴

求y=3sin(-2x+π/3)的单调区间和对称轴
y=-3sin(2x-π/3)
-π/2+2kπ<2x-π/3<π/2+2kπ
-π/12+kπ<x<5π/12+kπ
单调减区间(-π/12+kπ,5π/12+kπ)k∈Z
π/2+2kπ<2x-π/3<3π/2+2kπ
5π/12+kπ<x<11π/12+kπ
单调增区间(5π/12+kπ,11π/12+kπ)k∈Z
对称轴2x-π/3=π/2+kπ
x=5π/12+kπ/2 k∈Z