Conrad said "Do a curve fit on a saw tooth wave and my point will be clear to all....you get the profile of a very worn out saw."
I definitely agree.
Not quite the sine wave I pictured but it uses the preferred average(14). I didn't spend much time and Excel isn't my favorite platform but given time and a higher research budget <g> I might hit the right combo. It's 90 degrees out of phase rather than the anticipated 180.