已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|

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已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|显然A=5.周期T=2*(7π/

已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|
已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|

已知函数y=Asin(ωx+φ)(A>0,ω>0,|φ|
显然A=5.
周期T=2*(7π/12x-π/12)=π,ω=2
x=π/12就是五点法作图的第二个点,2*π/12+φ=π/2,所以φ=π/3
函数的解析式为：y=5sin(2x+π/3)

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