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Hello!

I have a function

I know what the values of

How do I do this? Where do I start?

I haven't done any maths work in years but i still have access to Matlab, Mathematica, Mathcad from my collage days.

Any help greatly appriciated, as I can't find anything on the web, not knowing which keywords (proper terminology) I should be using.

I have a function

**y(x)**with variables**a; b; c; d.**I know what the values of

**a; b; c; d**roughly should be, but I am trying to calculate them precisely, so the graph of the function over the region from**a**to**a+90°**would look as straight (horizontal with smallest possible amplitude) as possible.How do I do this? Where do I start?

I haven't done any maths work in years but i still have access to Matlab, Mathematica, Mathcad from my collage days.

Any help greatly appriciated, as I can't find anything on the web, not knowing which keywords (proper terminology) I should be using.

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