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Tangent fitting into a function

thread552-472208

Tangent fitting into a function

Tangent fitting into a function

(OP)
How can I fit a tanget into a function?

I need the red line in a function.

Thank you smile

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RE: Tangent fitting into a function

If you fit a cubic spline to those 5 points, you have a cubic polynomial for the curve on both sides of that point.
You can differentiate either of those cubic polynomials to find dy/dx as a function of x, and then plug in your x value.

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(2B)+(2B)' ?

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