f(x)=a*sin(x)+b*cos(x) 求周期T
没看出来是运用的哪个公式，
人气：334 ℃ 时间：2020-06-11 13:27:20
解答
f(x)=asinx+bcosx=根号(a²+b²)sin(x+C),其中tanC=b/a
周期：T＝2派/1=2派
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