求y=sinX+sin(x+π/2)的值域,周期,单调区间

问题描述:

求y=sinX+sin(x+π/2)的值域,周期,单调区间

y=sinx+cosx
=根号2sin(x+π/4)
值域∈[-根号2,根号2]
周期=2π
2kπ-π/22kπ-3π/42kπ+π/4