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A quick observation might conclude that this is just a sin function, but the thing I'm looking to find the answer to is the straightness between each maximum, and brief dip before and after the maximum.

enter image description here

If it helps at all, following an EKG heartbeat line but less extreme maximums and minimums is the desired effect.

What would a good example trigonometric equation of this line?

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Might be worth looking at sinc. –  dtldarek Jan 31 '13 at 23:00
    
Or $\ \mathrm{sinc}(x)\,e^{-a\,x^2}=\frac{\sin(x)\,e^{-a\,x^2}}x\ $ with $\ a\approx \frac 1{20}$. –  Raymond Manzoni Jan 31 '13 at 23:54
    
$\cos(a\,x)\,e^{-(a\,x)^2/3}\ $ could be even better... –  Raymond Manzoni Feb 1 '13 at 0:07
    
That's good, but it doesn't repeat. –  MrMusAddict Feb 1 '13 at 0:23
    
If you want repetitions you may use something like : $\displaystyle f(x):=\cos(x)\sum_{k=-\infty}^\infty e^{-(x-6\,k\pi)^2/5}\ $ with the sum at the right a theta function. alpha graph –  Raymond Manzoni Feb 1 '13 at 0:37
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