Firstly, according to the size of Y value in the image, if the highest point is 2, then A=2, that is, if the highest point is K, then A = K. 。

Then the function period t is obtained from the image. According to T=2π/w, w can be obtained. For example, t = 2π, then W= 1.

Then find the highest point and substitute it into the function to find φ. Note: It is best not to substitute the equilibrium point, otherwise an error may occur.

Sorry, I can't draw for some reason.