求y=sin(x+π/4)的单调区间和周期
问题描述:
求y=sin(x+π/4)的单调区间和周期
答
T=2π/1=2π
sinx增则2kπ-π/2
2kπ-π/2
增区间(2kπ-3π/4,2kπ+π/4)
同理,减区间(2kπ+π/4,2kπ+5π/4)