已知函数y=Asin(ωx+φ)+K(A>0,ω>0)的图象求解析式时,常采用待定系数法.A为简谐运动的振幅,是物体离开平衡位置的最大距离,可表示为A=(y_(max)-y_(min))/2,K为简谐运动物体的平衡位置,可表示为K=(y_(max)+y_(min))/2.由于A与K的值从图象观察获得比较容易,本文不进行介绍,以下介绍“ω”与“φ”的求解方法.一、“ω”的解题突破口——周期在公式中,“ω”与物体简谐运动的频率、 The known coefficient y = Asin (ωx + φ) + K (A> 0, ω> 0) when the image is analytic formula, to be determined by constant coefficient method .A harmonic motion amplitude, is the object from the equilibrium position The maximum distance, which can be expressed as A = (y_ (max) -y_ (min)) / 2, K is the equilibrium position of a harmonic motion object and can be expressed as K = (ymax + ymin) Since the values ​​of A and K are relatively easy to obtain from the image observation, this paper does not introduce the following method to solve the problem of “ω” and “φ” Period In the formula, “ω ” the frequency of harmonic motion with the object,