Display the Edit Amplitude dialog box as described in Selecting an amplitude type to define.
Click the arrow to the right of the Time span field, and specify how you want to define the amplitude as a function of time:
In the Circular frequency field, enter $\omega $, the circular frequency, in radians per time.
In the Starting time field, enter ${t}_{0}$.
In the Initial amplitude field, enter ${A}_{0}$, the constant term in the Fourier series.
In the data table, enter values for A, the coefficient of the cosine terms, and B, the coefficient of the sine terms. For detailed information on how to enter data, see Entering tabular data.
Click OK to save your amplitude definition and to close the Edit Amplitude dialog box.
