已知函数f(x)=2根号3sinxcosx+2sin^2x-1,x求最小正周期和单调区间.速求
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 15:56:41
Qհ*f&U戵˫eKjs @i=+\:㐨57Ւ,}nί6p`ny T+WFx>ȍXKʱy>N00OP H(XR D0Ӝ!pC&p֛Y\YPxW M;^ˌbV,Ȉ̊Hi@{3ѽ"vN{/Y-p&s6œklhe\tW{vM}ϛ!Ur%-=|nOs i*WH kh|َzF܈.aMӀhn߯l/"F8|l/?ќ<T k
已知函数f(x)=2根号3sinxcosx+2sin^2x-1,x求最小正周期和单调区间.速求
已知函数f(x)=2根号3sinxcosx+2sin^2x-1,x
求最小正周期和单调区间.速求
已知函数f(x)=2根号3sinxcosx+2sin^2x-1,x求最小正周期和单调区间.速求
f(x)=√3 sin2x+(1-cos2x)-1=√3sin2x-cos2x=2sin(2x-π/6)
最小正周期T=2π/2=π
单调增区间:2kπ-π/2=
f(x)=√3sin2x-cos2x
=2sin(2x-π/6)
最小正周期T=2π/2=π
递增区间:
-π/2+2kπ<2x-π/6<π/2+2kπ
-π/3+2kπ<2x<2π/3+2kπ
-π/6+kπ
递减区间:
π/2+...
全部展开
f(x)=√3sin2x-cos2x
=2sin(2x-π/6)
最小正周期T=2π/2=π
递增区间:
-π/2+2kπ<2x-π/6<π/2+2kπ
-π/3+2kπ<2x<2π/3+2kπ
-π/6+kπ
递减区间:
π/2+2kπ<2x-π/6<3π/2+2kπ
2π/3+2kπ<2x<5π/3+2kπ
π/3+kπ
祝你开心!希望能帮到你,如果不懂,请追问,祝学习进步!O(∩_∩)O
收起
f(x)=2根号3sinxcosx+2sin^2x-1=√3sin2x-cos2x=(1/2)sin(2x-π/6)
1)T=2π/2=π
2) 2kπ-π/2≤2x-π/6≤2kπ+π/2 =>kπ-π/6≤x≤kπ+5π/12
=>单调区间增区间为:[kπ-π/6,kπ+5π/12]
同理:单调区间减区间为:[kπ+5π/12,kπ+5π/6]