设函数f(x)=sin(2x+φ)(-π
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设函数f(x)=sin(2x+φ)(-π
设函数f(x)=sin(2x+φ)(-π
设函数f(x)=sin(2x+φ)(-π
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把对称轴即x=∏/8代入原式子,即sin(∏/4+φ)=1或者-1,再用(-π
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