Question: plotting a function

Hi, 

Please how I do plot: theta := -(65.7014900075861*(cos(-4.536529763+45365.29764*z)+.1749541674))*exp(-1.603200636*t) for z=0..d.

I tried this: 

display(plot([seq(subs(t = i, theta), i = [seq(0.1*ii, ii = 1 .. 7)])], z = 0 .. d));

But I want this sequence: [seq(subs(t = i, theta), i = [seq(0.1*ii, ii = 1 .. 7)])] to include Pi/2 such that t_0 = Pi/2 in the plot. I.e., I want the Pi/2 to be the initial value in the sequence.

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