数字知识,已知函数f(x)=Asin(wx+@)(A0绝对值@

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数字知识,已知函数f(x)=Asin(wx+@)(A0绝对值@
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数字知识,已知函数f(x)=Asin(wx+@)(A0绝对值@
数字知识,已知函数f(x)=Asin(wx+@)(A0绝对值@

数字知识,已知函数f(x)=Asin(wx+@)(A0绝对值@

A=-2

T/2=5π/12-(-π/12)=π/2

T=π,w=2.

f(x)=-2sin(2x+θ)

f(-π/12)=-2sin(-π/6+θ)=2

sin(-π/6+θ)=-1

-π/6+θ=-π/2+2kπ,k∈Z.

θ=-π/3+2kπ,k∈Z.

|θ|<π,θ=-π/3.

f(x)=-2sin(2x-π/3).