HOW Can i draw tangent lines to the a curve through a point

emre unlu shared this question 6 years ago

hi. HOW Can i draw tangent lines to the a curve through a point NOT ON the curve?

the geogebra can easily draw tangent lines to the a curve such as x² + y²=0 from a point A(0,-2) But when the curve is such as y=x² and a point A(0,-2) THEN geogebra can not draw tangent lines

How can i do this?

and why the geogebra cannot do this in the second case?what is the difference? 1

Hi,

use the Tangents_Tool 1

:-) Can you draw an example in geogebra pls 1

ok i got it.

it should be written in y=x^2 format not in f(x)=x^2 1

Are you sure that's what you were trying to do? From what I see here, the command Tangents returns the tangent to the function at x(A), not passing through A. 2

hello

tangent[point,function] works different tangent[point,conic]

in first case it does the tangent to function in (x(a),f(x(A)))

in second case it does the tangent through A

y=x^2 is a conic but f(x)=x^2 is a function, so the results are different

saludos

another option tangent[line,conic]