已知函数f(x)=sin(x+π/2)+sin(π-x)

问题描述:

已知函数f(x)=sin(x+π/2)+sin(π-x)
求函数f(x)的最值和最小正周期;
求函数f(x)的单调递增区间:

f(x)=cosx+sinx=√2sin(x+π/4)
最大值√2,最小值-√2,最小正周期2π
x+π/4∈[2kπ-π/2,2kπ+π/2],k∈Z
[2kπ-3π/4,2kπ+π/4],k∈Z