函数y=Asin(ωx+φ)(A>0,ω>0,
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函数y=Asin(ωx+φ)(A>0,ω>0,
函数y=Asin(ωx+φ)(A>0,ω>0,
函数y=Asin(ωx+φ)(A>0,ω>0,
最大值=5,最小值=-5
A>0
∴A=5
T/2=5π/2-π=3π/2
∴T=3π
w=2π/T=2π/3π=2/3
y=5sin(2/3x+φ)
函数过(π/4,5)
∴sin(2/3*π/4+φ)=1
∴2/3*π/4+φ=π/2+2kπ,k∈Z
φ=π/3+2kπ,k∈Z
∵|φ|
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