f(x)=3sin(2x+π/2)
令2kπ+π/2<2x+π/2<2kπ+3π/2(k∈Z)
得kπ<x<kπ+π/2(k∈Z)
即函数f(x)=3sin(2x+π/2)的单调递减区间是(kπ,kπ+π/2)(k∈Z)
如果不懂,请Hi我,祝学习愉快!
f(x)=3sin(2x+π/2)
令2kπ+π/2<2x+π/2<2kπ+3π/2(k∈Z)
得kπ<x<kπ+π/2(k∈Z)
即函数f(x)=3sin(2x+π/2)的单调递减区间是(kπ,kπ+π/2)(k∈Z)
如果不懂,请Hi我,祝学习愉快!