求函数y=2sin(π/4-x)和y=2sin(x-π/4)的单调区间

问题描述:

求函数y=2sin(π/4-x)和y=2sin(x-π/4)的单调区间

求函数y=2sin(π/4-x)和y=2sin(x-π/4)的单调区间
解析:这二个函数相位相反,
即y=2sin(π/4-x)=-2sin(x-π/4)
y=2sin(x-π/4)
-π/2