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Can KAlgebra compute the equation of the tangent line?

User avatar Jeff91
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I started playing with KAlgebra today and I love the way it displays the tangent line to the graph you have selected as you move the mouse. The thing I was wondering is if there is a way I can have it provide me with the equation of the tangent line at a given point on a graph? Been searching around online and read through the help files but couldn't find anything on the subject.

Regards,
~Jeff


User avatar apol
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Well it's really simple.

You just need to get the derivative on any point you want and adapt and you'll get the slope.

The tangent function has to look something like y = m*x+b.

Let's say x**2 on x=3.

m:=(diff(x**2 : x))(3))
b:=(x->x**2)(3)

Good luck!
Aleix

PD: I think I answered that on an e-mail. I just answered here because that way maybe somebody can take advantage of that.

 
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