问题描述: 解一题:分段函数f(x)={①sinx,cosx≤sinx ②cosx,sinx<cosx},求其增区间? 1个回答 分类:数学 2014-12-13 问题解答: 我来补答 1.x∈[2kπ,2kπ+π/4] 单减2.x∈[2kπ+π/4,2kπ+π/2] 单增3.x∈[2kπ+π/2,2kπ+5π/4] 单减4.x∈[2kπ+5π/4,2kπ+2π] 单增故增区间为 x∈[2kπ+π/4,2kπ+π/2]∪[2kπ+5π/4,2kπ+2π] 展开全文阅读