Formula expression in Numbers

Hi,
I'm very new to Numbers so can anybody help me express the formula -
Anchor Load=Load divided by Cosine half angle over 2
The "Anchor Load will be 2 x cells, the "Load" would be a cell, the "angle" would be a cell.
Any help much appreciated.
Mike

"What are M and A in image 2?"
M & A represent the Magnitude and Phase of an FFT (i.e. The real part of a complex FFT and the Phase).
"Could it be you are looking for the "least absolute residual" instead of "least squares"?"
I'm not really sure about this.
In image 2, what are constants and what are the fitting paramters?
The fitting parameters are "n" and "k" on image 1, representing refractive index and absorption coefficient respectevly, basically, image 3 shows the Real part of an FFT. Image 1 is a trasnfer function that explains image 3 in IDEAL situation, so, I am trying to recreate Image 3 from an Ideal function by replacing the "n" and "k" values constantly untill image 2 is satisfied.  Image 2 basically gives the difference between the actual parameters (i.e. image 3) that were practically measured, and the recreated parameters (estimated from Lev-Med) algorithm.
"Can you point to a website that describes the theory behind it?"
Attached is a paper where they describe this process. It has some physics involved but it should be a light read. They use the "Nelder-Mead algorithm" (i.e. the Downhill Simplex nD VI ), but I find it even more difficult to implement this formula on this VI.
"Simply create a subVI that matches the model template and incorporates your model as a function of [X] and your model parameters"
Is it possible to give just a simple example VI that includes a "summation and an exponential" form, maybe I can built on that the more complex formula from image 1.
Overall:
Even that image 1 contains alot of letters, the only variables are "ns - as seen on image" and "k", all others are defined descrete values. I can perhaps replace all the letters in image 1 with numbers and only leave "n" and "k" as variables to make it easier, and make that as the starting point in building the VI.
Thanks
Attachments:
Highly accurate optical material parameter determination with THz time tomain spectroscopy.pdf ‏426 KB

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